Patek Philippe. A fine 18K gold and diamond set automatic calendar bracelet watch

Nautilus, Ref: 3700/013, Circa 1979
Patek Philippe. A fine 18K gold and diamond set automatic calendar bracelet watch
Model: Nautilus
Reference: 3700/013
Date: Circa 1979
Movement: 36-jewel Cal.28-255C nickel-finished automatic, Seal of Geneva, Gyromax balance, free sprung regulation, gold edged rotor, No.1308183
Dial: Black ridged, applied luminous filled baton hour markers, white outer minute divisions, date aperture at 3, polished baton hands with luminous inserts
Case: Brushed and polished cushion form 3-part case, diamond set bezel, No.555035
Strap/Bracelet: Fitted brushed and polished Patek Philippe link
Buckle/Clasp: Signed 18K gold folding clasp
Signed: Case, dial & movement
Size: 42mm
Accompaniments: Patek Philippe box, Certificate of Origin, brochure