Repeating circle; Box key

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Repeating circle box key.

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ID:	NAV0076.8
Type:	Repeating circle; Box key
Display location:	Not on display
Creator:	Magellan, Jean Hyacinthe de; Ramsden, Jesse
Date made:	circa 1787
Credit:	National Maritime Museum, Greenwich, London, Adams Collection
Measurements:	Overall: 4 mm x 19 mm x 40 mm
Parts:	Borda circle (Repeating circle) Repeating circle; Box (NAV0076.1) Repeating circle; Shaded eyepiece (NAV0076.2) Repeating circle; Shade (NAV0076.3) Repeating circle; Shade (NAV0076.4) Repeating circle; Magnifying glass (NAV0076.5) Repeating circle; Handle (NAV0076.6) Repeating circle; Adjusting pin (NAV0076.7) Repeating circle; Box key (NAV0076.8)