Portable transit telescope

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Portable telescope spring

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ID:	ZBA0774.4
Type:	Spring
Display location:	Not on display
Creator:	Unknown
Date made:	1874
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 10 mm x 90 mm x 12 mm
Parts:	Portable transit telescope (Telescope) Portable transit telescope (Telescope stand) (ZBA0774.1) Portable transit telescope (Spirit level) (ZBA0774.2) Portable transit telescope (Lens cap) (ZBA0774.3) Portable transit telescope (Spring) (ZBA0774.4)