I have here an odd screen that I took out of a parts ELM that I can't identify. Scan posted. The screen is very much brighter than the normal Hass. screens. It has a split-image, a microprism doughnut, and the rest of the field is typical groundglass. The whole thing has grids, though they barely show in the scan. The screen is obviously 2 layers. A very nice screen. But here's the problem. On this underside view, I have pointed out how the inner frame is higher than the outer frame, which means that it rests on the camera pegs on this higher surface, and throws infinity way out of whack.
I can't believe this is a Beatty, or Interscreen, or whatever. I'm wondering if this bright beautiful screen might just be some Russian junk. Any ideas? Thank you.