• Movement 
  • Year of manufacture 
  • Lot number 
  • Diameter 
  • Location


John Arnold, London, No. 17. with London hallmarks for 1777.
Very fine and extremely rare, silver deck Chronometer with spring detent escapement and
"O-Z" balance. Accompanied by a three-tier mahogany fitted deck box
Three-body, "consular", polished, maker's mark "MRM", swivel pendant.
White enamel with radial Roman numerals, outer dot minute markers and Arabic five
minute numerals, large subsidiary seconds. Blued steel "Spade" hands, the minute hand
secured by a screw.
60 mm., frosted gilt full plate, ringed cylindrical pillars, 10 holes jeweled with screwed
chatons, fusee with chain, Harrison's maintaining power, Arnold spring detent escapement
with large steel escape wheel, steel and brass "O-Z" balance with meantime adjustment
screws and temperature adjustment nuts, free-sprung blued steel helical balance spring
with terminal curves, diamond endstone, pierced and engraved single footed clock.