Astronomical compendium ivory ring

Ivory ring for the astronomical compendium for latitude 51° North. The third section is also removable and is empty,

Object Details

ID: AST0502.3
Type: Astronomical compendium ivory ring
Display location: Not on display
Creator: Unknown
Date made: 17th century
Credit: National Maritime Museum, Greenwich, London, Georges Bernard Collection
Measurements: Overall: 12 mm; Diameter: 42 mm
Parts: Astronomical compendium