Portable refractor telescope objective lens cap

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Objective lens cap for the portable astronomical refractor telescope.

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ID:	AST0906.4
Type:	Objective lens cap
Display location:	Not on display
Creator:	Tulley, Charles
Date made:	circa 1800
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Diameter: 104 mm;Overall: 36 mm
Parts:	Portable refractor telescope (Telescope) Portable refractor telescope box (Portable refractor telescope box) (AST0906.1) Portable refractor telescope (Telescope part) (AST0906.2) Portable refractor telescope (Telescope part) (AST0906.3) Portable refractor telescope objective lens cap (Objective lens cap) (AST0906.4) Portable refractor telescope eyepiece (Portable refractor telescope eyepiece) (AST0906.5) Portable refractor telescope eyepiece (Portable refractor telescope eyepiece) (AST0906.6) Portable refractor telescope eyepiece (Portable refractor telescope eyepiece) (AST0906.7) Portable refractor telescope eyepiece (Portable refractor telescope eyepiece) (AST0906.8) Portable refractor telescope eyepiece (Portable refractor telescope eyepiece) (AST0906.9) Portable refractor telescope eyepiece (Portable refractor telescope eyepiece) (AST0906.10) Portable refractor telescope lens cap (Portable refractor telescope lens cap) (AST0906.11)