Swiss gold quarter repeating chromometer watch Circa 1848

Gold rquarter repeating watch by Patek Philippe
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A very fine and exceptionally rare Swiss 18K gold quarter repeating hunting cased pocket chromometer with Adrien Philippe’s first keyless winding system patented in 1845, circa 1848.
Gilt movement, 14 jewels, wolf’s tooth winding, Earnshaw’s spring detent escapement with jeweled locking pin, free-sprung cut bimetallic compensation balance with gold temperature screws and mean time screws, cranked arms, blued steel helical balance spring, repeating with two hammers on two gongs activated by a slide in the band.
Chased and engraved case with small scrolls, maker?s punch PM. Hinged gold cuvette. Cuvette and movement signed.
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Diameter: 55 mm.
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Signed: Patek I Spolka w Genewie
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Accompanied by the Extract from the Archives.
Sold December 16, 1850.

This is an exceptionally rare watch by Patek Philippe, not only because Patek Philippe rarely used spring detent escapements, but also because it has Adrien Philippe’s first form of keyless winding and hand setting, a rarity in itself.