Sextant sight tube

Sextant sight-tube.

ID:	NAV1158.5
Type:	Sextant sight tube
Display location:	Not on display
Creator:	Parkinson & Frodsham
Date made:	circa 1870
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Diameter: 25 mm;Overall: 81 mm
Parts:	Sextant Sextant box (NAV1158.1) Sextant telescope (NAV1158.2) Sextant telescope (NAV1158.3) Sextant (NAV1158.4) Sextant sight tube (NAV1158.5) Sextant telescope (NAV1158.6) Sextant shaded eyepiece (NAV1158.7) Sextant shaded eyepiece (NAV1158.8) Sextant shaded eyepiece (NAV1158.9) Sextant shaded eyepiece (NAV1158.10) Sextant shaded eyepiece (NAV1158.11) Sextant shaded eyepiece (NAV1158.12)