Important Modern & Vintage Timepieces
Geneva, Jun 28, 2020
LOT 320
JAMES HORNBY POCKET CHRONOMETER; "IMPROVED" GUYE DETENT ESCAPEMENT; 18K YELLOW GOLD
CHF 800 - 1,400
HKD 6,400 - 11,200 / USD 800 - 1,400
Sold: CHF 2,750
Very fine and rare18K yellow gold, half hunting-case, key-winding, round-shaped, pocket chronometer, with subsidiary seconds at 6 and “improved” spring detent escapement. Cover and case-back guilloché (engine-turned). White enamel dial with radial Roman numerals; yellow gold double “Spade” hands.
| Grading System | |
|---|---|
Grade: AAA |
Excellent |
Case: 3 |
Good |
Movement: 3* |
Good Overhaul recommended, at buyer's expense |
Dial: 3-70-01 |
Good ENAMEL AND VARIOUS TYPES OF DECORATION Hairline HANDS Original |
Brand James Hornby
Model Improved Patent Chronometer
Year Circa 1859-1860
Movement No. 39113 (stamped "Guye's Patent / Escapment"
Case No. 14.0 (by "H F", Chester), with Chester letter-date for 1859-1860
Caliber 18''', ¾ plate, gilded brass, fusee and chain, gold screwed-chatons (setting), "improved" Guye detent escapement, cut bimetallic compensated balance with gold poising screws and free-sprung cylindrical hairspring with terminal curves, diamond end-stone.
Dimensions 49.8 mm.
Signature Dial, case and movement