162,500 HKD
THOMAS ENGEL, CHRONOMETRE – TYPE CONCOURS OBSERVATOIRE, GOLD Thomas Engel, “Chronomètre” No. 8. Made in the 1980s. Very fine and rare, 18K yellow gold, keyless, “Chronomètre – Type Concours Observatoire” pocket watch with 30-hour power reserve, thermometer and calendar. Three-body, “Empire”, screwed-down back cover decorated with engine-turning grains d’orge, polished band and bezel, gold glazed cuvette, ball-type swiveling pendant acting as the winding crown. Silver, radial Roman numerals on brushed chapter ring, outer minute dot divisions, engine-turned and whitened center, subsidiary seconds, thermometer sector at 9 o’clock, days of the week between 2 and 3 o’clock, aperture for power reserve indication. Gold Breguet hands. 22’’’, Cal.5011K, rhodium-plated, fausses cotes decoration, stamped with Thomas Engel punch mark, 19 jewels, straight-line lever escapement, monometallic balance, selfcompensating balance spring with outer terminal curve, balance and escape wheel pivots with shock absorbers, micrometer regulator. Dial, case and movement signed. Diam. 56 mm. Notes Professor Thomas Engel is known worldwide for his research in the production of polymers. In 1966, he developed a process for cross-linking plastic extrusions, particularly those of cross-linked polyethylene. Based on the reaction of plastics at pressures of 15’000 to 150’000 psi and temperatures of approximately 300° and the presence of a peroxide catalyst, a cross-linking agent, this process was a signi
Auctioneer:
Antiquorum
Date:
2012-06-23
