Sextant sight tube

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Sextant sight-tube.

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ID:	NAV1144.4
Type:	Sextant sight tube
Display location:	Not on display
Creator:	Berge, Matthew
Date made:	circa 1810
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Diameter: 20 mm;Overall: 55 mm
Parts:	Sextant Sextant box (NAV1144.1) Sextant telescope (NAV1144.2) Sextant telescope (NAV1144.3) Sextant sight tube (NAV1144.4) Sextant magnifer and arm (NAV1144.5) Sextant silver reflector (NAV1144.6) Sextant handle (NAV1144.7)