In the years after WWII, several countries experimented with general-use optical sights on service rifles. The Germans had pioneered the concept with the ZF-41 long eye relief optic during the war (and the ZF-4, to some extent), and the British actually adopted the EM-2 with a permanently-mounted 1x optical sight in 1951 (only to un-adopt it almost immediately in favor of the FAL). The US also tinkered with the idea, as demonstrated by this 1x optical sight on an M1 rifle for sale at Rock Island. I was unable to find any reference information on this type of sight, but it does seem to fit the period. Perhaps one of our readers will recognize it?
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!