Pivot case base

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ID:	NAV0271.7
Type:	Pivot case base
Display location:	Not on display
Creator:	Unknown
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements:	Diameter: 33 mm;Overall: 25 mm
Parts:	Arctic shore dry compass card Arctic shore dry compass card (NAV0271.1) Arctic shore dry compass bowl (NAV0271.2) Arctic shore dry compass azimuth circle (NAV0271.3) Arctic shore dry compass box (NAV0271.4) Arctic shore dry compass box key (NAV0271.5) Pivots and cup (NAV0271.6) Pivot case base (NAV0271.7) Pivot case lid (NAV0271.8)