PATEK PHILIPPE AUTOMATIC, 18K YELLOW GOLD, 3601-1 MOD. 

Movement is the automatic winding Patek Philippe Caliber 28 255C with 36 jewels, Adjusted to 5 positions and heat/cold, and stamped with the Geneva Seal. 
The movement features a free-sprung balance and an 18k rotor segment for increased winding efficiency. 

MEASURES: case diameter is 33mm, not including original Crown; 34mm wide including Crown.

ESTIMATED AGE: CIRCA 1975 (datation based on serial number).

GENERAL CONDITIONS: very good+ (please, refer to pictures).