Here is my Atari Heavy Sixer, made in Sunnyvale:
NTSC/PAL/Sears/Special: NTSC
Serial # (Ex: #54035V or #007649): 73252E
MFG Location (Sunnyvale, Taiwan): Sunnyvale, CA
(Owner/AA Member), jsbehnke747
(Location= City, State, Country): Oshkosh, WI
A/B Channel Slot (Yes/No): No
A/B Channel Switch (Yes/No): No
Functional (Yes/No): Yes
Previous Owner: Unknown-Purchased at a thrift store several years ago.