U.S. Tank Mounted Periscope Head Assembly
New periscope head assembly reconditioned in the late 1960's. FSN# 1240-622-4434. ID plate is marked Head Assembly #8270991 with serial number. Weighs 11 lbs.
Note: Because of variations in periscope types and changes in FSN numbers it is difficult to identify the actual model designation of the periscope and the related tank it is mounted to.