Swiss lever chronograph with 30 minute register Circa 1906

Gold open faced chronograph by Patek Philippe
–
A very fine, rare and large Swiss 18 carat gold open faced keyless lever pocket watch with chronograph and 30 minute register, circa 1906. Chronometro Gondolo. Sold on December 2nd, 1908. Frosted gilt movement, gold wheel train, 23 jewels, wolf’s tooth winding, straight-line moustache lever escapement, cut bimetallic compensation balance with gold temperature screws, blued steel Breguet balance spring with outer terminal curve, Patek Philippe micrometric cam regulator patented on January 13, 1891, chronograph work set on the back, activated by a push piece in the crown. Gold hinged cuvette. White enamel dial with Roman numerals, outer minute track and fifths of a second divisions, Arabic five minute numerals, subsidiary dial for the seconds and 30 minute register, original blued steel spade hands. Polished case, the back with foliate engraved monogram, bolt at 1 o’clock to lock the chronograph. Dial, case, cuvette and movement signed, case and movement numbered. Accompanied by the Extract from the Archives.
–
Diameter: 56 mm
–
Signed: Patek, Philippe & Cie Genève
–
Gondolo watches with chronograph are very rare.