Importantes Montres de Collection

Geneva, May 15, 2011

LOT 447

John Bennett - Gold Hunting Cased Spring Detent Chronometer John Bennett, "Maker to the Royal Observatory", 65 & 64 Cheapside, London, No. 16812. The case with London hallmarks for 1912-13. Very fine and rare, large and heavy, 18K gold, hunting-cased, keyless, pocket chronometer with Earnshaw?s footed spring detent escapement and free-sprung helical balance spring. Accompanied by the original John Bennett box.

C. Four-body, "pomme et filets", polished. Hinged gold cuvette. D. White enamel, radial Roman numerals, outer minute track, subsidiary dial for the seconds. Blued steel spade hands. M. 42 mm., gilt brass half-plate, going barrel, jeweled to the third wheel, Earnshaw type footed spring detent escapement, cut bimetallic comensation balance with gold temperature and meantime adjustment screws, free-sprung blued steel helical balance spring with inner and outer terminal curves, diamond endstone. Dial, cuvette and movement signed. Diam. 53 mm.