Fine Swiss 18 Carat gold hunting cased pocket watch Circa 1860

Gold lever keyless pocket watch 
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A very fine and very rare Swiss, 18 Carat gold hunting cased pocket watch, circa 1860. With Adrien Philippe’s first patented stem wind and hand setting mechanism of 1845 without coasting. An engine turned and polished case, flat topped winding crown. Hinged gold cuvette. White enamel dial with radial Roman numerals, outer minute track, subsidiary seconds. Blued steel Breguet hands. A frosted gilt movement, 15 jewels, Wolf’s tooth winding, straight-line lever escapement a moustache, cut bimetallic compensation balance, blued steel flat balance spring, index regulator. Cuvette signed the case stamped M&B.
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Diameter: 45 mm
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Signed: Patek Philippe & Co.  Genève
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The dial is slightly rusted.
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The present watch uses Adrien Philippe’s first winding and hand-setting mechanism, French patent No. 1317 of April 22, 1845. The winding pinion is fixed to the winding shaft, for winding the crown it must be turned clockwise and cannot be turned back with that typical ratchet noise. To disengage the winding to set the hands, the winding crown can be pulled out. Very few watches survive with this early winding mechanism without coasting.