There's no secret. The XC-1411 monitor came from Atari's main office in Markham, Ontario, Canada. As far as I'm aware they used it in their service department to diagnose and repair the 8-bit series of computers. When Atari closed their doors in Markham, Ontario it was left behind. It was given to me by a friend. (I think I may have actually traded a surround sound module, that I built in a high school electronics class, for the XC-1411.) I am not exactly sure how he wound up with this monitor.
I used it as a TV for several years. After that, it sat in my parent's basement for well over 20 years. I finally dug it out two years ago and had another friend look at it because it had developed a peculiar issue with colour fade out. Essentially after about 20 minutes the picture would fade to black and white. He determined that a capacitor had gone bad and replaced it. As a precaution, he also went further and replaced all of the electrolytic capacitors. From what I know he then put it on Ebay for sale.
If the XC-1411 is the one that I let go, I hope the new owner can get it repaired. It would be a shame to see it go to waste.
The XC-1411 was manufactured by Goldstar (LG Electronics). Goldstar was also one of 3 companies that manufactured the SC1224 monitor for the Atari ST series of computers. The XC-1411 closely resembles the Goldstar SC1224 monitor. One of the differences is that the XC-1411 monitor has a red power indicator whereas the SC1224 has a green power indicator. Electronically speaking the XC-1411 may be a similar design to the Goldstar SC1224 with only one major difference. The XC-1411 would have an additional composite video to RGB circuit.