Parallel rule

Rolling parallel rule, made of ebony with brass fittings and marked with a Hydrographic Office number (S.140).

Object Details

ID: NAV0608
Type: Parallel rule
Display location: Not on display
Creator: Watkins & Smith
Date made: circa 1835
Credit: National Maritime Museum, Greenwich, London. Caird Fund.
Measurements: Overall: 20 mm x 615 mm x 68 mm