Gold Chronograph Watch no. 15849

Case: 18K pink gold hunting-cased WITH PATENT KEYLESS COVER WINDING Dial: perpetual calendar, chronograph, register, moon phases Movement: Provenance: ???? - Haas Neveux, Geneva 2011 - Antiquorum 2011-11-13 56,250chf HAAS NEVEUX, MINUTE REPEATING PERPETUAL CALENDAR & CHRONOGRAPH WITH PATENT KEYLESS COVER WINDING Haas Neveux & Co. , Genève, No. 15849. Made circa 1880. Extremely fine and equally rare, large, 18K pink gold, minute-repeating, hunting-cased lever chronometer pocket watch with perpetual calendar, chronograph, register, moon phases and remontoire perpétuel à décrochement keyless cover winding to the English patent (No. 3945) of Benjamin Haas 1873. Four-body, bassine, polished, fi ve-bar hinges, co-axial chronograph and hand-setting button in the pendant. Hinged gold cuvette with engine turned border. White enamel, Arabic numerals, outer minute track with fi ve-minute Arabic numerals, outermost fi fths of a second divisions with gold painted numerals calibrated to 300 units, subsidiary dials for the seconds combined with days of the week, months of the four-year cycle, date combined with 30-minute register, aperture for the moon phases. Black spade hands. Notes This watch is in exceptionally good condition. It would appear to be the most complicated watch by Haas Neveux with patent cover winding to be offered at auction to date. In 1873 Benjamin Haas patented a winding mechanism (English patent No. 3945 of Dec. 2, 1873). The idea was to use the energy generated by closing the front cover to wind the watch. The initial idea was improved upon; his watch features a well developed system with a 36-hour power reserve generated by 12 closings. To achieve this, Haas changed the ...