Patek Philippe Calatrava Solid 18K Yellow Gold 37mm Watch (Ref. 5107/1) W/Patek Piano Wood Box & Extract From the Archives - This stunning, investment quality timepiece was made by one the most prestigious luxury watchmakers in the industry, Patek Philippe. This Calatrava watch is truly a collector's dream, and a must-have for any watch collector or enthusiast. The watch features: 37mm solid 18k yellow gold case with sapphire crystal skeleton case back, opaline dial with yellow gold sword-shaped indexes, outer minute track and date display at 3 o'clock, caliber 315/190 self-winding 30 jewel movement with fausses cotes decoration, sweeping seconds hand, scratch resistant sapphire crystal, water resistance to 25 meters, and solid 18k yellow gold 18mm wide bracelet with folding Calatrava buckle. The watch is signed on the case, dial and movement, and has recently been serviced and is working perfectly. The watch will come housed in a Patek Philippe piano wood box, and will come with the Extract from the Archives. The watch measures 8.25" in circumference. Reference #: 5107/1, Movement #: 325XXXX, Serial #: 420XXXX. (WEIGHT: 171.8 grams)