Historical information
Believed to have come from a Sherman Tank, c. WWII.
Physical description
Main frame is rectangular, painted jungle green. Bottom viewer is metal with glass window. Top viewer is made of bakelite with glass window. On the rear viewer side are 2 dials and a brass ?? that adjust elevation and deflection. The rear panel has a large ?? knob.
Inscriptions & markings
The side has a plaque "PERISCOPE M4 - MINNEAPOLIS - HONEYWELL
REGULATOR COMPANY. No 54340 1942 USA"