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Auctioneers Dr. Crott 90th Auction

65 A. Lange & Söhne, Glashütte B/Dresden, Movement No. 92301, Case No. 92301, 63 mm, 193 g, circa 1924 An important, as new Glashuette half seconds beating deck chrono- meter with pivoted detent chronometer escapement and helical balance spring, sold in 1924 for 540 Swiss Francs Case: silver, tiered, polished, case design “Jürgens”, gold hinge. Dial: silvered, radial Roman hours, auxiliary seconds, blued spade hands. Movm.: 3/4 plate movement, frosted, gilt, Grossmann’s pivoted detent chronometer escapement with 2 screwed gold chatons, nickel steel gold screw compensation balance with 14,400 alternations per hour, freesprung blued helical hairspring, very finely engraved balance cock, gold chronometer wheel. Pocket chronometers with barrel Pocket chronometers are considered to be the precursors to deck watches. Lange & Soehne originally produced pocket chronometers with going barrels for scientific purposes. Often set in wooden boxes, they were to be used as deck chronometers on ships. Following this style the watches were designed with 14,400 alternations per hour; as a result the second hand was able to jump every half second. The watches all have pivoted detent escapements, which were designed in two different styles: one version was the chronometer escapement according to Berthoud, the other the escapement according to Julius Grossmann, which had an additional safety lever to prevent the escapement wheel from going on once the balance had been taken out. Lit.: “Die Lange-Liste” by Martin Huber, Munich 2000, page 97pp; “A. Lange & Soehne” by Reinhard Meis, Munich 1997, page 211pp; “Glashuette und seine Uhren” by Kurt Herkner, Dormagen 1978, page 152. 朗格 格拉蘇蒂 B/Dresden — 意義深遠,保存如新的格拉蘇蒂半秒 觀測時計,附等臂平衡擒縱及圓柱體螺旋擺輪,在1924年以540 瑞士法郎成交 39533 C: 2 D: 2 M: 2, 41 50.000 - 60.000 EUR 62.500 - 75.000 USD 500.000 - 600.000 HKD

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