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skintigh

Compiling 2600 Jr. "Unicorn" 1-chip serial number list, please help!!

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I'm looking for any Atari 2600 Jr. with serial number 1900000 or higher

 

Please help me determine the number of 1-chip/JAN/Janice/Unicorns made! I am looking for:

  • Serial number and color (example: A1 98 2041661, pictures preferred)
  • Number of chips (include a pic of it opened, or through the vents, or see https://imgur.com/gallery/QH9RZM3)
  • Revision letter on main board

 

The data: [updated 6/17/2021]

A1 YM serial# chips Rev Source                      Notes                    

A1 89 1884673   3       Seen on eBay by skintigh                             
A1 
89 1884747   3       Seen on eBay by skintigh                             

A1 89 1894480   3       Seen on eBay by skintigh                             

A1 89 1894481   3    F  toymailman                                           

A1 89 1912894   3       Seen on eBay by skintigh    89 color is super faded  

A1 8B 1929296   3       Seen on eBay by skintigh                             

A1 8B 1929476   *       Seen on eBay by skintigh                             

A1 8B 1945963   *       Seen on eBay by skintigh                             

A1 8B 1954263   3       Seen on eBay by skintigh                             

A1 8B 1954896   3       Seen on eBay by skintigh                             

A1 8B 1965465   3       Seen on eBay by skintigh    8B super blurry, 89?     
A1 8C 1975714   *       Seen on eBay by ApolloBoy                            

A1    1979508   3       Seen on eBay by skintigh                             
A1 91 1979907   3       The Mr Video                50/50 91 or WAY O-of-O 81

A1 91 1980121   3       Seen on eBay by skintigh    91? super blurry         

A1 93 1985935           Seen on eBay by ApolloBoy                            

A1 95 2002635   3       Seen on eBay by skintigh                             

A1 ?? 2004067   3       Seen on eBay by skintigh    blue smudge, 95? 93?     

A1 8C 2005540   3       Seen on eBay by skintigh    8C out of order          

A1 8C 2007705   3       Seen on eBay by skintigh    8C out of order, weird   

A1 8C 2007742   3       Seen on eBay by skintigh    8C out of order, weirder 

A1 95 2009309   1   4   skintigh                    95 is blurry, could be 96

A1 96 2011186   3       Seen on eBay by skintigh    out of order? or next is?

A1 95 2016703   3       Seen on eBay by skintigh    OOO, or was previous one?

A1 97 2025558   3       Seen on eBay by skintigh                             

?? ?? ???????   1   3   LittleJoe                   failed contact here &ebay

A1 9B 2038237   1   4   thanatos                    9B out of order          

A1 9B 2038245   1   4   tomytronic                  Another 9B out of order!?

A1 98 2041661           Mirage1972                  "possibly 1-chip"        
A1 98 2042053   1       from TK via skintigh                                 
A1 98 2045143   1   4   Longhorn Engineer                                    

A1 99 2046413   1   4   skintigh                                             
A1 9B 2057527   1  
     Benzman66                                            
A1 01 2071066           Ravenprose                  can't contact here&flickr

A1    2072459   3       Seen on eBay by skintigh    I see what could be 02   

 

Color Key:

 1-chip  3-chip 

* assumed 3-chip

 

Analysis

Maybe the serial numbers are assigned to cases, later also stuck on the box, and both are stamped with the Y/M when they pass QA. So ones that fail and are repaired will have out of order stamps?

Maybe 2009309 had its entire board replaced?

The out-of-order numbers seem to happen in the final months. Maybe supplies were so short that Atari repaired every unit they could that had previously failed QA, shipped them, and then shipped the prototypes JANs?

 

Other sightings:

LittleJoe has the only Rev 3 Atari I've ever seen, but efforts to contact him here and ebay failed. Unknown serial #

AtariJoe has "a few." His email, youtube channel and website are gone. He stopped tweeting & posting on FB on 1/30/2017. May be deceased? :(

the.golden.ax had 1, sent it to Longhorn, I assume that's the # above, he was going to send it to Marty for a museum

maiki has X 11A4 304699, sounds like a pal 3

namedjughead had one, but it died and is long gone.

 

How many were made?

All 2600 Jrs: 2,071,066+ made (assuming no overlap in serial numbers and assuming Ravenprose's number is real)

1-chips: 19,290 in the contiguous block of known 1-chips 2038237 to 2057527 

              32,830 counting 2038237 to 2071066, assuming it is real.

              45,508 if we assume 2025559 is a 1-chip (optimistic) and assume 2071066 is real and count to it, and assume that 2009309 is a glitch

              60,000+ if we count from 2009309 to 2071066 and assume the 2 3 s are glitches (very optimistic) This seems even less likely after finding 2011186

              50,000 might be a good guess, as that's a nice round number of chips to order from a fabricator.

 

Assumptions for all units listed:

Long rainbow model Atari 2600 Junior
Serial number format appears to be: A1 YM NNNNNNN

Made in Taiwan in the year 198Y for 7-9 or 1990 Y=0, month M (1-9,A,B,C for Jan-Dec)

Color of YM doesn't seem to matter. So far I've seen blue, green and black.

NNNNNNN is the raw number of units made at that factory (I have no actual evidence of this)

FCC ID EBA72R2600

NTSC
(PAL units seem to have a different FCC ID, and maybe always start with X?)

 

Board revisions spotted:

   3-chip:

      NTSC: Rev A, B, C, D, E, F

      PAL: Rev F1

   1-chip:

      Rev 3, 4

 

Chip version info

Every chip I've seen from a Rev 4 board says:

   C101688-002
   ATARI 1987
   RP2A10

then the next line is slightly different, maybe they are batch numbers or something:
   38 8L1 54
   3? ?L43 
   38 8L1 43
   38 8L2 49
   38 8L2 48

The only chip from a Rev 3 board I've seen is different (photo is blurry and hard to read, guesses are in parens) :
   C101688-001
   ATARI 1987
   RP2A10
   (3/2/1)4 7C(E/1/L/I) 5(2/7/1)

Assumption is chip was made by Ricoh, as RP2A10 is similar to the NES chip RP2A03

 

Sources

I pulled some of this data from a 2010 thread and by contacting owners directly. Thank you everyone for your help!

One chip "JAN" technical documents: https://www.digitpress.com/library/techdocs/

[green eeffee red ffe0e0 faint ref fff0f0]

Edited by skintigh
1980121

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Thank you! So that looks like a PAL unit -- FCC ID EBA2T82600

 

I have several more serial numbers I wanted to add to my data, but I can't edit my post?!?! That's going to make it hard to update the list.

 

Anyway, now I'm looking for "A1 8C ..." or later

 

A1 89 1884673 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 89 1894480 - 3-chip, Rev ?, Seen on eBay by skintigh [looks 3-chip]

A1 89 1894481 - 3-chip, Rev F, toymailman    [I assume Rev F = 3-chip]

A1 89 1912894 - 3-chip, Rev ?, Seen on eBay by skintigh (color is super faded)

A1 8B 1929296 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1945963 - ?-chip, Rev ?, Seen on eBay by skintigh (no pics, seller xb might find more info but so special)
A1 8C 1975714 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 ?? 1979508 - 3-chip, Rev ?, Seen on eBay by skintigh
A1 93 1985935 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 ?? 2025558 - 3-chip, Rev ?, Seen on eBay by skintigh, (trying to double check it's 3 chip and get the board rev)

-- -- -------

A1 98 2041661 - ?-chip, Rev ?, Mirage1972 "possibly 1-chip"            

?? ?? ??????? - 1-chipRev 3, LittleJoe (trying to contact him for #) 
A1 98 2042053 - 1-chip, Rev ?, from TK reported second hand by skintigh
A1 98 2045143 - 1-chip, Rev 4, Longhorn Engineer                       
A1 9B 2057527 - 1-chip, Rev ?, Benzman66                               
A1 01 2071066 - ? chip, Rev ? Ravenprose                               

Edited by skintigh

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A1 89 1884673 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 89 1894480 - 3-chip, Rev ?, Seen on eBay by skintigh [looks 3-chip]

A1 89 1894481 - 3-chip, Rev F, toymailman    [I assume Rev F = 3-chip]

A1 89 1912894 - 3-chip, Rev ?, Seen on eBay by skintigh (color is super faded)

A1 8B 1929296 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1945963 - ?-chip, Rev ?, Seen on eBay by skintigh (no pics)
A1 8C 1975714 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 ?? 1979508 - 3-chip, Rev ?, Seen on eBay by skintigh
A1 93 1985935 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 97 2025558 - 3-chip, Rev ?, Seen on eBay by skintigh 

-- -- -------

A1 98 2041661 - ?-chip, Rev ?, Mirage1972 "possibly 1-chip"            

?? ?? ??????? - 1-chipRev 3, LittleJoe (trying to contact him for #) 
A1 98 2042053 - 1-chip, Rev ?, from TK reported second hand by skintigh
A1 98 2045143 - 1-chip, Rev 4, Longhorn Engineer                       
A1 9B 2057527 - 1-chip, Rev ?, Benzman66                               
A1 01 2071066 - ? chip, Rev ? Ravenprose                               

 

 

 

A1 97 2025558 Seems to be confirmed a 3-chip 🤕 😪

A1 97 2025558.jpg

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Not a useful data point, but mildly interesting: apparently some boxes have the serial number on them. Only 1 out of 3 of this type of box I've seen on ebay.

 

 

53983.jpg

53983 box.jpg

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Another spotted on ebay:

A1 8B 1929476

I assume it's 3-chip, can't tell.

I figure if nothing else, collecting these numbers will let me figure out how many units they made in the final months. Right now it looks like in 9/89 they made >28000, but in the lower 20ks in Nov + Dec. Then maybe 15k by 3/99 falling to 11k by the end of the year and Jan 1990.

 

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Posted (edited)

A1 89 1884673 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 89 1894480 - 3-chip, Rev ?, Seen on eBay by skintigh [looks 3-chip]

A1 89 1894481 - 3-chip, Rev F, toymailman    [I assume Rev F = 3-chip]

A1 89 1912894 - 3-chip, Rev ?, Seen on eBay by skintigh (color is super faded)

A1 8B 1929296 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1929476 - ?-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1945963 - ?-chip, Rev ?, Seen on eBay by skintigh (no pics)
A1 8C 1975714 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 ?? 1979508 - 3-chip, Rev ?, Seen on eBay by skintigh
A1 93 1985935 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 97 2025558 - 3-chip, Rev ?, Seen on eBay by skintigh 

-- -- -------

A1 9B 2038245 - 1-chip, Rev 4, tomytronic                              

A1 98 2041661 - ?-chip, Rev ?, Mirage1972 "possibly 1-chip"            

?? ?? ??????? - 1-chipRev 3, LittleJoe (trying to contact him for #) 
A1 98 2042053 - 1-chip, Rev ?, from TK reported second hand by skintigh
A1 98 2045143 - 1-chip, Rev 4, Longhorn Engineer                       
A1 9B 2057527 - 1-chip, Rev ?, Benzman66                               
A1 01 2071066 - ? chip, Rev ? Ravenprose                               

 

Found a new one on reddit! This expands the serial number range a few thousand, but it also throws in a wrench. 9B should mean it was made in 1989 in Nov, yet the serial number comes before 98 which is August. Did they use the wrong stamp? Reordered serial numbers?

Edited by skintigh

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A1 89 1884673 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 89 1894480 - 3-chip, Rev ?, Seen on eBay by skintigh [looks 3-chip]

A1 89 1894481 - 3-chip, Rev F, toymailman    [I assume Rev F = 3-chip]

A1 89 1912894 - 3-chip, Rev ?, Seen on eBay by skintigh (color is super faded)

A1 8B 1929296 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1929476 - ?-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1945963 - ?-chip, Rev ?, Seen on eBay by skintigh (no pics)
A1 8C 1975714 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 ?? 1979508 - 3-chip, Rev ?, Seen on eBay by skintigh
A1 93 1985935 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 97 2025558 - 3-chip, Rev ?, Seen on eBay by skintigh 

-- -- -------

A1 9B 2038245 - 1-chip, Rev 4, tomytronic                              

A1 98 2041661 - ?-chip, Rev ?, Mirage1972 "possibly 1-chip"            

??  ??  ???????  - 1-chipRev 3, LittleJoe (trying to contact him for #) 
A1 98 2042053 - 1-chip, Rev ?, from TK reported second hand by skintigh
A1 98 2045143 - 1-chip, Rev 4, Longhorn Engineer                                

A1 99 2046413 - 1-chip, Rev 4, skintigh                                                
A1 9B 2057527 - 1-chip, Rev ?, Benzman66                                           
A1 01 2071066 - ? chip, Rev ? Ravenprose                               

 

I FOUND ONE!!!

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A1 89 1884673 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 89 1894480 - 3-chip, Rev ?, Seen on eBay by skintigh [looks 3-chip]

A1 89 1894481 - 3-chip, Rev F, toymailman    [I assume Rev F = 3-chip]

A1 89 1912894 - 3-chip, Rev ?, Seen on eBay by skintigh (color is super faded)

A1 8B 1929296 - 3-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1929476 - ?-chip, Rev ?, Seen on eBay by skintigh

A1 8B 1945963 - ?-chip, Rev ?, Seen on eBay by skintigh (no pics)
A1 8C 1975714 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 ?? 1979508 - 3-chip, Rev ?, Seen on eBay by skintigh
A1 93 1985935 - ?-chip, Rev ?, Seen on eBay by ApolloBoy

A1 97 2025558 - 3-chip, Rev ?, Seen on eBay by skintigh 

-- -- -------

??  ??  ???????  - 1-chipRev 3, LittleJoe (unable to contact him for #) 

A1 9B 2038237 - 1-chip, Rev 4, seen by skintigh on ebay for $249C (~$200US) 😳🙄                              

A1 9B 2038245 - 1-chip, Rev 4, tomytronic                              

A1 98 2041661 - ?-chip,  Rev ?, Mirage1972 "possibly 1-chip"            
A1 98 2042053 - 1-chip, Rev ?, from TK reported second hand by skintigh
A1 98 2045143 - 1-chip, Rev 4, Longhorn Engineer                                

A1 99 2046413 - 1-chip, Rev 4, skintigh
A1 9B 2057527 - 1-chip, Rev ?, Benzman66                                           
A1 01 2071066 - ?-chip,  Rev ? Ravenprose                               

 

I spotted a new, even lower numbered unit! And it's also 9B, before 98...?!?! Maybe someone used the wrong stamp in August for a while and didn't notice because it's similar to 98? Or maybe I misunderstand the meaning?

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You can ask the moderators to allow you to update the original post forever if need be. 
also make sure you are reading B vs 8 and 3 vs 5 correctly. 
 

I ran into a lot of ink smears and blurry faded numbers in the 1200XL list I maintain.   And don’t expect the serials to be sequential but the can be an indicator of another error.  
 

the 7800 serials get really wonky in the latter years. 

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Posted (edited)

I have A1 00xxx, so don't interest you, I think.

Do you interest with AT sn or X1 too? I have few A2600jr PAL

Edited by Sikor
letter error

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yes A1 00 is after A1 98, so he should be interested.  The number between A1 and the longer serial number is what determines the year and month.

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Ok, I'll make photo today or tommorow and share it here. What is with "AT" serials?

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15 hours ago, Sikor said:

Ok, I'll make photo today or tommorow and share it here. What is with "AT" serials?

I think AT serials have a different format. usually in the year 84 or 85.

 

 

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Posted (edited)

ok, so that isn't iterrest for You.

I look closer and my foult - it is A1 86xxxx, and it is NTSC console

AT - is PAL console (also X1xxxx)

SOrry, my mistake. I can add photo, but it is  earlier year 😕

Edited by Sikor
more info

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On 8/6/2020 at 1:57 PM, skintigh said:

Please Help

Please help me determine the number of 1-chip/JAN/Janice/Unicorns made!

Is this what you are looking for...?

 

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On 3/11/2021 at 8:44 AM, kheller2 said:

You can ask the moderators to allow you to update the original post forever if need be. 
also make sure you are reading B vs 8 and 3 vs 5 correctly. 
 

I ran into a lot of ink smears and blurry faded numbers in the 1200XL list I maintain.   And don’t expect the serials to be sequential but the can be an indicator of another error.  
 

the 7800 serials get really wonky in the latter years. 

Proof I didn't misread the Bs :)

 

 

v0rYwLJ.jpg

s-l1600.jpg

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More serial number shenanigans...

 

97 2025558 is clearly 3-chip: 835228984_972025558.thumb.jpg.acdec578e93475385ab3375502b0d212.jpg1218891564_A1972025558.thumb.jpg.4ce92306de027d6aed0f8f6fc051a264.jpg

96 2009309 is clearly 1-chip?!?!?!?982664006_962009309.thumb.jpg.a93e0ae6749596a67e64070b6c7f760e.jpg

If true, that could potentially double the number of 1-chip models out there. I'll find out if it's really a 1-chip in about a week :D I bought it untested, wish me luck.

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I would suggest folks crack open the questionable units to really validate they are 1chip.  I wouldn't trust the case cutouts for the POT as identification.  On the 1chip version, is the POT hole (hah pothole) still there, and just the POT missing?  It looks like just the POT is MIA, so that might be the best indicator w/o opening up units.

 

Since you have two 9B units so close in serial... open them :)

 

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On 3/16/2021 at 8:52 PM, kheller2 said:

I would suggest folks crack open the questionable units to really validate they are 1chip.  I wouldn't trust the case cutouts for the POT as identification.  On the 1chip version, is the POT hole (hah pothole) still there, and just the POT missing?  It looks like just the POT is MIA, so that might be the best indicator w/o opening up units.

 

Since you have two 9B units so close in serial... open them :)

 

I'm IDing them by the RF shield and circuit board visible through the vents. I don't own the low 9B units but both are confirmed 1 chip.

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On 3/16/2021 at 10:34 AM, Crazy Climber said:

Is this what you are looking for...?

 

Sorry I missed this post before. Yes, exactly. I think I have this one already from the ebay post, but I'm double checking. Thanks!

  • Like 1

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On 3/11/2021 at 8:44 AM, kheller2 said:

You can ask the moderators to allow you to update the original post forever if need be. 
also make sure you are reading B vs 8 and 3 vs 5 correctly. 
 

I ran into a lot of ink smears and blurry faded numbers in the 1200XL list I maintain.   And don’t expect the serials to be sequential but the can be an indicator of another error.  
 

the 7800 serials get really wonky in the latter years. 

I managed to find one moderator and asked, no reply. No idea how to find others, and search doesn't help.

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20 hours ago, skintigh said:

I managed to find one moderator and asked, no reply. No idea how to find others, and search doesn't help.

I just gave you edit rights to the first post.

 

Mitch

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