This 1960's 10x50 Periscope,in chrome and brass, has original Carl Zeiss optical lens and filters.This piece has duel levels and visual field measurements etched around the collar. It has an internal sun sheild and humidity reduction crystals to keep moisture out of the lens. These Periscopes were often mounted at the lookout towers along the Berlin wall. This Periscope comes with instructions and has its original transport case.