Reflecting circle draw tube

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Reflecting circle spare draw tube, two cross wires.

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ID:	NAV0081.3
Type:	Reflecting circle draw tube
Display location:	Not on display
Creator:	Unknown
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London, Adams Collection
Measurements:	Diameter: 23 mm;Overall: 166 mm
Parts:	Reflecting Circle Reflecting circle box (NAV0081.1) Reflecting circle telescope (NAV0081.2) Reflecting circle draw tube (NAV0081.3) Reflecting circle telescope (NAV0081.4) Reflecting circle sight tube (NAV0081.5) Reflecting circle handle (NAV0081.6) Reflecting circle handle (NAV0081.7)