Gents Patek Philippe Calatrava in 18k yellow gold on leather strap with 18k tang buckle . Manual w/ subseconds. Ref 5196. Fine Pre-owned Patek Philippe Watch. Certified preowned Classic Patek Philippe Calatrava 5196 watch is made out of yellow gold on a 6.5" Leather Strap band with a 18k tang buckle. This Patek Philippe watch has a 37 x 37 mm case with a Round caseback and Silver Stick dial. It is Gray and Sons Certified Authentic and comes backed by our 12-month warranty. Each watch is inspected by our certified in-house Swiss-trained watchmakers before shipment including final servicing, cleaning, and polishing.