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Auktionen Dr. Crott 91st Auction

569568 Robert Molyneux, London, Movement No. 546, 59 mm, 185 g, circa 1820/1871  A heavy pocket chronometer with spring detent escapement according to Thomas Earnshaw - with original mahogany box with numbered ivory shield Case: 18k gold, tiered, polished, gold dome, case maker’s punch mark “JM” (John Martin, London). Dial: enamel, off-white, radial Roman hours, auxiliary seconds, gold spade hands. Movm.: full plate movement, keywind, frosted, gilt, signed, chain/fusee, bimetallic Z-chronometer balance with 4 screws and 2 movable trapezoid weights according to Thomas Earnshaw, freesprung blued helical balance spring, chatoned diamond endstone on balance. Robert Molyneux Robert Molyneux was a pupil of Thomas Earnshaw and and adopted his master’s methods; when this watch was produced, he had his workshop at 44 Devonshire Square near today’s Liverpool Street Station. Molyneux was initially in a working partnership with his fellow apprentice Charles John Cope at Earnshaw’s workshop; when Parry and Lyon went on expedition in 1821, they took amongst other things the chronometer No. 405 by Molyneux & Cope with them on their ships “Hecla” and “Fury”. Molyneux later moved to 30 Southampton Row and took his sons Henry and Robert into his business. He developed a chronometer with thermometer and a useful temperature compensation for chronometer balances at the same time as Eiffe. In England the name Molyneux appears around 1572, which was the time of the emigration of the Huguenots from France. Robert Molyneux 倫敦 — 厚實的懷錶時計,Thomas Earnshaw設計的 彈簧振盪擒縱,附原廠鑲嵌象牙編號桃花心木盒 40383  C: 2, 43 D: 2 M: 2, 41  7.500 - 9.000 EUR 8.300 - 9.900 USD 67.500 - 81.000 HKD Robert Pennington, London, Movement No. 111/510, 51 mm, circa 1806  A rare boat chronometer Case: mahogany box, sunk, screwed brass bowl. Dial: enamel, radial Roman hours, auxiliary seconds, signed, gold spade hands. Movm.: full plate movement, firegilt, chain/fusee, keywind, very fine florally hand- engraved balance cock, moulded pillars, spring detent escapement according to Thomas Earnshaw, Pennington’s auxiliary compensation screw balance, freesprung blued helical balance spring, chatoned diamond endstone on balance, chatoned ruby endstone on escape wheel. Robert Pennington Robert Pennington was a renowned watchmaker who worked in London from about 1780 to his death in 1813. He is thought to have invented the screw balance - a very early version of which was used in the chronometer we have here. Pennington worked with William Howells and a number of other makers; between 1794 and 1799 the group produced at least 27 examples of Thomas Mudges’s ‘marine timekeepers’ commissioned by Mudge’s son. Pennington also created the magnificent drawings of plates in “A Description with Plates” which Mudge Jr. published in 1799. Robert Pennington 倫敦 — 罕見的觀測時計 40555  C: 3, 11 D: 2 M: 2, 41  3.500 - 5.000 EUR 3.900 - 5.500 USD 31.500 - 45.000 HKD