The Patek Philippe [5250G-013] Annual Calendar, Moon Phases 
Recognizable by its three apertures along an arc for displaying the day, the date and the month, the Reference 5205 Annual Calendar pairs its white-gold version with an elegant sunburst dial in two tones of blue shading to black. The case construction is notable for the slightly concave bezel and the delicately pierced strap lugs. A sleek, dynamic and very contemporary style graces this calendar watch requiring adjustment only once a year.
WATCH
Self-winding mechanical movement. Caliber 324 S QA LU 24H/206. Day, date and month in apertures. 24-hour indication. Sweep seconds hand.
DIAL
Blue sunburst, black gradated, gold applied hour markers.
CASE
White Gold. Sapphire-crystal case back. Water resistant to 30 m. Diameter: 40 mm. Height: 11.36 mm.
STRAP
Alligator with square scales, hand-stitched, shiny black. Prong buckle.