Star plotter altitude ruler pointer

Star plotter altitude ruler pointer. Found partially sellotaped to the lid of the box.

Object Details

ID: NAV1027.6
Type: Star plotter altitude ruler pointer
Display location: Not on display
Creator: Unknown
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 4 mm x 24 mm x 9 mm
Parts: Star plotter