TM 9-1240-315-35, TECHNICAL MANUAL: FIELD AND DEPOT MAINTENANCE MANUAL - PERISCOPE M37 (14-JAN-1963)

TM 9-1240-315-35, TECHNICAL MANUAL: FIELD AND DEPOT MAINTENANCE MANUAL - PERISCOPE M37 (14-JAN-1963)., This manual contains instructions for the field and depot maintenance of periscope M37. Periscope M37 is used as a vision device in 105-mm gun full tracked combat tank M60A1. The ‘pins, on either side of the housing near the cover, act as trunnions for mounting it in the vehicle.