Testing telescope binocular sight

This testing telescope for viewing device comprises a binocular sight that mounts onto a triangular base plate. Each tube of the binocular sight has a cross hair and gives an inverted image. It is contained in a wooden box.

Object Details

ID: NAV0932.2
Type: Testing telescope binocular sight
Display location: Not on display
Creator: W. Ottway & Co. Ltd
Date made: 20th century
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 53 mm x 147 mm x 136 mm