Reflecting circle magnifier swivelling arm

Reflecting circle magnifier swivelling arm. Magnifier is missing.

Object Details

ID: NAV0080.6
Type: Reflecting circle magnifier swivelling arm
Display location: Not on display
Creator: Unknown
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 17 mm x 77 mm x 17 mm
Parts: Reflecting circle