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Auctioneers Dr. Crott 90th Auction

107 106 105 International Watch Co., Schaffhausen “Ingenieur Automatic 500.000 A/M”, Case No. 2439733, Cal. 37590, 34 mm, circa 1990 A gentleman’s rare, antimagnetic automatic wristwatch with date - with original box, operating instructions and papers Case: steel, screw back, IWC steel bracelet with deployant clasp. Dial: black, applied indexes, centre seconds, date indication, luminous baton hands. Movm.: rotorwind movement, decorated, gilt, 5 adj., 21 jewels, Glucydur balance, shock protection for balance, fine adjusting device. 萬國錶 “Ingenieur Automatic 500.000 A/M” — 罕見,抗磁的男仕自 動腕錶,附日期,另附原盒,操作說明書及文件 39238 C: 2, 10 D: 2 M: 2, 41, 51 2.600 - 3.200 EUR 3.300 - 4.000 USD 26.000 - 32.000 HKD International Watch Co., Schaffhausen “Ingenieur Automatic 500.000 A/M”, Case No. 2516133, Cal. 37590, 34 mm, circa 1985 A gentleman’s heavy, antimagnetic automatic wristwatch with date - with original box, original certificate and papers Case: 18k gold, screw back, heavy IWC 18k gold bracelet with deployant clasp. Dial: gilt, applied indexes, centre seconds, date indication, luminous baton hands. Movm.: rotorwind movement, decorated, gilt, 5 adj., 21 jewels, Glucydur balance, shock protection for balance, fine adjusting device. 萬國錶 “Ingenieur Automatic 500.000 A/M” — 厚實,抗磁的男仕自 動腕錶,附日期,另附原盒,原廠證書及文件 39230 C: 2, 10 D: 2 M: 2, 41, 51 5.500 - 8.000 EUR 6.900 - 10.000 USD 55.000 - 80.000 HKD International Watch Co. Schaffhausen “Ingenieur - Officially Certified Chronometer Automatic”, Movement No. 2597722, Case No. 2537569, Ref. IW3522-002, 34 mm, circa 1980 A gentleman’s fine automatic wristwatch with date - with original box, operating instructions, guarantee card, chronometer certificate and accessories Case: steel, screw back, screwed crown, IWC steel bracelet with deployant clasp. Dial: white, applied indexes, centre seconds, date, luminous baton hands. Movm.: rotorwind movement, rhodium-plated, ground, hack feature, Glucydur balance, shock protection for balance, cam type fine adjusting device. 萬國錶 “Ingenieur - Officially Certified Chronometer Automatic” — 精 緻的男仕自動腕錶,附日期,原盒,操作說明書,保證卡,時計 證書及相關配件 39345 C: 2 D: 2 M: 2, 41 2.200 - 2.600 EUR 2.800 - 3.300 USD 22.000 - 26.000 HKD Ingenieur Automatic 500.000 A/M The Ingenieur 500,000 A/m stands for one of the most glorious failures in IWC’s later history, and a failure she was in at least a commercial sense. During the early eighties, IWC had developed two exceptional amagnetic movements based on the ETA calibre 2892, the Porsche compass watch (Ref. 3551 with calibre 37541 and 37542) and the “Minentaucheruhr” for the German Bundeswehr (Ref. 3519 with Cal. 3755AM). Now, IWC planned to commercialise the acquired technical know-how by developing an even more resistant calibre for a new leader model of their “Ingenieur” line. The goal was not to shield the movement against magnetic fields in a soft iron Faraday’s cage as in the previous models, but to make the movement itself amagnetic. The expectations were even surpassed when the new calibre 35790 set a new world record surviving a field of 3.9 million A/m. These astonishing results were achieved by a set of technical innovations, including using rubies as rotor ball-bearings, a special amagnetic material for pallet fork and roller, as well as a new alloy (niobium-zirconium) for the balance spring. Only 2700 examples have been produced. Source: http://www.moeb.ch/Ingenieur/10d_500000Am.html, as of 09/25/2011.

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