Patek Philippe 18k Yellow Gold Calatrava strap watch. The model number of this Patek Philippe is 3520 D. The case is 18k yellow gold featuring a enamel dial with black Roman numeral hour markers and textured 18k yellow gold bezel. The case measures 32mm in diameter. The inner caseback is stamped "PATEK-PHILIPPE GENEVE SWISS 18K 0.750 2848XXX 3520 D". The movement is signed "PATEK PHILIPPE & Co. Geneve 177 SWISS EIGHTEEN 18 JEWELS 1371388". This Patek Philippe is accompanied by a generic strap and buckle. The serial number of this Patek Philippe is 2848XXX. Total weight : 34.5g. Condition: (Good).