Importantes Montres de Collection
Geneva, Nov 13, 2011
LOT 370
SILVER PATENT WATCH BAROMETER Swiss, ?Watch Barometer Patent?, No. 1454, case No. 886916. Made circa 1900. Fine, rare and unusual silver keyless pocket watch with combined barometer.
CHF 2,000 - 3,000
USD 2,200 - 3,300 / EUR 1,500 - 2,500
Sold: CHF 3,750
C. Three-body, " bassine et fi lets ", polished, engine-turned back with vacant cartouche. D. White enamel with radial Roman numerals, outer silvered engraved barometer ring. Gold spade hands. M. 18 "', gilt brass, 15 jewels, straight line lever escapement, bimetallic balance, Breguet balance spring, aneroid barometer mechanism fi xed above the back of the movement. Diam. 55 mm.
| Grading System | |
|---|---|
Grade: AA |
Very good |
Case: 3 |
Good |
Movement: 3* |
Good Overhaul recommended, at buyer's expense |
Dial: 2-01 |
Very good HANDS Original |
Notes
Lot 370
William Williams of Bury took out a
patent on March 26, 1890 in England for
an escapement that ?beats ten, twelve, or
sixteen times a second?. He added one
wheel to the standard train, placed the
escape wheel where the seconds hand is
located and employed an extremely fast
balance, beating 57,600 times per hour.