The top section of a periscope, tank, consisting of an inclosure which contains one or more mirror(s), and/or prism(s), and a window. It is readily removable to facilitate replacement.
Classification: Military equipments not identified by kind
NSN 4140-01-532-7195
NSN 5895-01-054-3060
NSN 5950-01-094-7451
NSN 6620-00-043-6082
NSN 5985-01-152-0715
NSN 5915-00-080-6385
NSN 5895-01-100-3472
NSN 5920-01-059-2680
NSN 6240-00-242-0003
NSN 6145-01-119-0547
NSN 6240-01-496-5066
NSN 5960-00-778-0808