Physical description
Part of a series of optical munition snapshots 1940-1947. Refer to Cat No 146 for full details. Black and white photo shows Bob Caldwell cutting with a diamond saw through a sandwich of optical glass . Duplicate copy of Cat no 146; in OMP Album Vol 2 #26.
Inscriptions & markings
In ink on lower left hand corner : “26”. Inscribed on back in pencil: “No. 26 ROBERT CALDWELL”