Swiss rose gold open faced ankerchronometer Circa 1889

Rose gold ankerchronometer watch by Patek Philippe
–
An exquisite Swiss 18 carat rose gold open faced ankerchronometer pocket watch, circa 1889. Extremely rare calibre with 2/3 plate, Geneva striping decoration, exceptionally large chronometer balance, lever movement with balanced lever, special fine adjusting device, screwed gold chatons. White enamel dial with Roman hours and outer minute divisions, subsidiary seconds, blued steel hands. Plain case. Case numbered, dial signed, cuvette and movement signed and numbered.
–
Diameter: 48.5 mm
–
Weight: 101 g
–
Signed: Patek, Philippe & Co Genève