A British military night vision periscope, dated to the Cold War era, was purchased for 49 euros from a German surplus shop by [msylvian59]
The periscope was in poor condition and desperately required a teardown to understand its workings and potentially restore it to working condition
It weighed 15kg and was made from industrial metal, with cryptic shutter controls and twin optics that hadn’t functioned in many years
One photo amplifier tube flickered with a greenish light, while the other was dead
There was no documentation available for the periscope, and unknown symbols and adjustment dials made the teardown process a challenging process, more akin to deciphering a dream from the British MoD than a straightforward engineering project
Despite the poor condition of the unit, [msylvian59] was still able to identify a number of graticules etched into the optics, highlighting the precise engineering of the relic from the Cold War era
