BRYANT BIGGS CHRONOMETER DETENT
ESCAPEMENT POWER RESERVE
Bryant Biggs, Cardiff, case No. 18411. Made circa 1860.
Very fine and rare, 18K gold, key-wound pocket
Chronometer with detent escapement, with power-
reserve indication
Three-body, heavy, polished.
White enamel, radial Roman numerals, outer minute
track, subsidiary dial for the seconds, sector below
12 for the power reserve. Blued steel spade hands.
Frosted gilt, three quarter plate, 18 jewels, detent
escapement, cut bimetallic compensation balance
with gold compensation screws, blued steel Breguet
balance spring, diamond endstone.
Movement signed.