Swiss gold quarter repeating pocket chromometer Circa 1848

Gold quarter repeating chronometer by Patek Philippe
–
A very fine and exceptionally rare Swiss 18 carat gold hunting cased quarter repeating pocket chromometer with Adrien Philippe’s first keyless winding system patented in 1845, circa 1848. Sold December 16th, 1850. Frosted gilt movement, 14 jewels, wolf’s tooth winding, Earnshaw’s spring detent escapement with jeweled locking pin, freesprung cut bimetallic compensation balance with gold temperature screws and mean time adjustment screws, cranked arms, blued steel helical balance spring, repeating with two hammers on two gongs activated by a slide in the band. Gold hinged cuvette. White enamel dial with Roman numerals, outer minute track, subsidiary seconds at 9 and original blued steel Fleur-de-Lys hands. Solid case, chased and engraved with small scrolls, master mark PM. Cuvette and movement signed, case numbered. Accompanied by the Extract from the Archives.
–
Diameter: 55 mm
–
Signed: Patek I Spolka w Genewie
–
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.