Ring

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Metal ring which can be inserted into the side of the lense.

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ID:	AST0892.4
Type:	Ring
Display location:	Not on display
Creator:	Unknown
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Diameter: 84 mm;Overall: 1 mm
Parts:	Lens Ring (AST0892.1) Ring (AST0892.2) Ring (AST0892.3) Ring (AST0892.4) Lens cover (AST0892.5) Box for the lens (AST0892.6)