Pocket telescope objective lens

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Objective lens for the non-achromatic telescope.

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ID:	NAV1510.2
Type:	Pocket telescope objective lens
Display location:	Not on display
Creator:	Unknown
Date made:	circa 1730
Credit:	National Maritime Museum, Greenwich, London, Caird Collection
Measurements:	Diameter: 42 mm;Overall: 3 mm
Parts:	Pocket telescope Pocket telescope objective lens cap (NAV1510.1) Pocket telescope objective lens (NAV1510.2)