Mainspring

An image showing 'Harrison 4 relics from mainspring - box and parts 1921-11'

An image showing 'Harrison 4 relics - packing found behind the lining of out case'

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Red card box containing relics of the 1921-22 restoration, including four pieces of paper packing found lining the outer case of H4 (apparently the remains of a receipt, one part dated 1752) and one piece of the original mainspring, 42mms long and scratched 'No.4'. Also one labelled piece of the maintaining spring of H4, found broken and removed in 1945.

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Object Details

ID:	ZAA0854
Collection:	Timekeeping
Type:	Mainspring
Display location:	Not on display
Creator:	Harrison, John; Gould, Rupert Thomas
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London, Gould Collection
Measurements:	Overall: 17 x 100 x 71 x 40 mm