Swiss very rare 18 Carat gold Ankerchronometer watch Circa 1883

Open faced pocket watch by Patek Philippe
–
A very rare Swiss Patek Philippe pocket watch chronometer with unusual movement, circa 1883.
18 carat gold case with monogram and dome signed and numbered. Ankerchronometer with very big chronometer balance and unusual main plate, very long regulator pointer and very rare Patek Philippe caliber. White enamel dial with Roman hours, outer minute track, sunk subsidiary dial for the seconds and pink gold hands.
Case, movement and dial signed.
–
Diameter: 48 mm
–
Weight: 85 g
–
Signed: Patek Philippe & Cie Genève