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Auktionen Dr. Crott 91st Auction

621620 Edward Howard & Co., Boston, Movement No. 209, Case No. 209, 51 mm, 103 g, circa 1870  A gentleman’s very fine, extremely rare American pocket watch - lever chronometer - so called “Blue Sapphire”, with large blue sapphire jewels - only 500 pieces of the famous “Blue Sapphire” were created, this watch bears the No. 209  Case: 18k gold, polished, à goutte, numbered and signed gold dome. Dial: enamel, Arabic numerals, auxiliary seconds, blued spade hands. Movm.: bridge movement, frosted, gilt, signed, wolfteeth winding wheels, “Patent D’05’10”, blue sapphire endstones on balance, lever and escape wheel, blue sapphire jewels, bimetallic chronometer balance with gold and platinum screws and 2 star-shaped regulation weights, blued helical freesprung balance spring with terminal inner curve. Most striking about this pocket watch are the large blue sapphire jewels - which are the reason why some collectors call the watch the “Blue Sapphire”. This is regarded to be the best pocket watch caliber ever produced in the United States. Edward Howard & Co. 美國波士頓 — 極精緻,極罕見的美國男仕懷 錶 - 工式時計,號稱”Blue Sapphire”,鑲大藍寶石,一共只生產 500只,這只的編號為209 40498  C: 2 D: 2 M: 2, 41  8.500 - 9.500 EUR 9.400 - 10.500 USD 76.500 - 85.500 HKD Albert H. Potter à Genève, Case No. 12153, 53 mm, 114 g, circa 1900  A gentleman’s rare Geneva pocket watch with date Case: silver, polished, à goutte, case maker’s punch mark “FP”, gold crown, hinge and shackle. Dial: enamel, radial Roman hours, auxiliary seconds at “3”, date indicator at “9”, blued spade hands. Movm.: specially designed bridge movement, nickel-plated, “fausses côtes” decoration, screwed gold chatons, club-tooth lever escapement, gold screw compensation balance, split, offset regulator tail, counterpoised lever. Albert H. Potter 日內瓦 — 罕見的日內瓦男仕懷錶,附日期 40493  C: 2 D: 2 M: 2, 41  8.200 - 10.000 EUR 9.100 - 11.000 USD 73.800 - 90.000 HKD

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