Ultra slim gentleman's Calatrava ref 3919 in 18ct white gold with hobnail patterned bezel and white lacquered dial with seconds elegantly displayed at six. Widely regarded as one of the simplest and most elegant of models made by Patek Philippe. The ultra slim white gold case houses the mechanical manually-wound cal 215 movement, the caseback is solid, and the watch is water-resistant to 30m. Complete with original box and certificate.