Pocket bubble sextant circular protractor

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ID:	ZBA0747.4
Type:	Pocket bubble sextant circular protractor
Display location:	Not on display
Creator:	Eastern Science Supply Co
Date made:	ca. 1946
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 181 mm x 181 mm
Parts:	Bubble Circle Sextant (Pocket bubble sextant) Pocket bubble sextant ruler (ZBA0747.1) Pocket bubble sextant pencil (ZBA0747.2) Pocket Bubble Sextant Instructions for use in finding Longitude and Latitude (Pocket bubble sextant instruction booklet) (ZBA0747.3) Pocket bubble sextant circular protractor (ZBA0747.4) Pocket bubble sextant protractor (ZBA0747.5) Pocket bubble sextant wallet (ZBA0747.6)