Patek Philippe 40.5mm Annual Calendar Chronograph Complications Watch Opaline Dial 5960/01G

40.5mm stainless steel case, sapphire-crystal back, silvery opaline dial with blackened gold applied hour markers, caliber CH 28-520 IRM QA 24H self-winding movement with annual calendar, chronograph, 60-minute and 12-hour mono counter, apertures for day date and month, approximately 45-55 hours of power reserve, vintage brown calf Leather Strap strap, clevis prong buckle. Water resistant to 30 m.