U-Boat periscope prisms

Two glass prisms from a U-boat periscope. Prism A is triangular in section with two faces painted black.

Object Details

ID: REL0700
Collection: Relics
Type: Glass prism
Display location: Not on display
Creator: Unknown
Date made: ca.1914
Credit: National Maritime Museum, Greenwich, London
Parts: U-Boat periscope prisms