Jeff Ruch sent me photos of this peculiar variation of the TL-122-A. It looks like it has been assembled from parts of different types of TL-122 flashlights. From the chrome plated switch, I would guess it was refurbished for the civilian market.
As for the battery cover, I think the black paint has worn off. It came off easily and TL-122-As with the original black paint on them are rare. Apart from the color, it looks just like the cover in one of the photos in my article.
Interestingly, the parts of this mix and match flashlight do fit together, and it actually still works.