U-Boat periscope prisms

Glass prism from a U-boat periscope. Triangular in section with two faces painted black.

Object Details

ID: REL0700.1
Type: Glass prism
Display location: Not on display
Creator: Unknown
Date made: ca.1914
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 58 mm x 112 mm x 80 mm
Parts: U-Boat periscope prisms (Glass prism)