Important Collectors’ Wristwatches, P...

New York - The Fuller Building, Dec 07, 2006

LOT 318

?Two-Day Marine Chronometer with Subsidiary Compensation? Arnold & Charles Frodsham, 84, Strand, London, No. 1538. Made circa 1850. Very fine and rare, mahogany, two-day going marine chronometer with subsidiary compensation and power reserve indication.

C. Later, brass bowl with screwed-down glazed bezel, gimbaled in a three-tier mahogany box, the central section with inset ivory signature plaque, glazed top and hinged lid, brass handles. D. Silvered, with radial Roman numerals, outer minute track, subsidiary seconds, power reserve indication below 12. Gold "spade" hands. M. Brass half plate, cut away for the barrel secured under a crescent-shaped bridge, ring-turned pillars with blued steel screws, fusée and chain with Harrison's maintaining power, spring-detent escapement, cut bimetallic compensation balance with peripheral temperature adjustment screws and mean time adjustment nuts, two-armed subsidiary compensation mounted on the balance pivot above the balance and with 2 perpendicular adjustment nuts on long screw threads, blued steel free-sprung helical balance spring with inner and outer terminal curves. Dial and box signed. Bowl 11 cm., box 15.5 x 15.5 cm.