Mens Patek Philippe Calatrava watch, 18kt yellow gold case (37mm diameter) with smooth bezel and screw-down crown, leather strap, white dial with gold hands and hour markers, date calendar at 3 o'clock, 29 jewel 315 caliber self-winding movement, sapphire crystal "see-through" case back, water resistant to 25 meters, hallmarked with the Geneva seal. Also available in 18kt white gold.