Reflecting circle draw tube

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Reflecting circle spare draw tube, two cross wires.

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ID:	NAV0080.3
Type:	Reflecting circle draw tube
Display location:	Not on display
Creator:	Unknown
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Diameter: 20 mm;Overall: 79 mm
Parts:	Reflecting circle Reflecting circle box (NAV0080.1) Reflecting circle telescope (NAV0080.2) Reflecting circle draw tube (NAV0080.3) Reflecting circle draw tube (NAV0080.4) Reflecting circle sight tube (NAV0080.5) Reflecting circle magnifier swivelling arm (NAV0080.6) Reflecting circle adjusting pin (NAV0080.7) Reflecting circle handle (NAV0080.8)