Here is an odd one. A 2.8F Opton on a camera that looks like a late 60s body. The guy thinks it might be a military issue but what would be the reason for wanting a 2.8F with a Zeiss Opton vs Planar or Xenotar?
http://www.9days.hk/equipments/0804/larger/RO2470568_10.jpg
Item number 140246987533
thanks Dennis