Small card pill box containing a 45 mm piece of H4’s mainspring

Small card pill box containing a 45 mm piece of H4’s mainspring, scratched 'from John Harrison Prize chronometer/No.4/ £2,000 23.XII.1923'. This piece was in the possession of watchmaker Heinrich Otto (to whom Gould presumably presented it) and thence to Charles Allix Esq., who presented it to the NMM.

Object Details

ID: ZAA0129
Collection: Timekeeping
Type: Main spring
Display location: Not on display
Creator: Harrison, John
Date made: circa 1760
People: Gould, Rupert Thomas
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 45 x 9 x 5 mm