Patek Philippe Annual Calendar Chronograph Platinum 5960P-001

This Patek Philippe Annual Calendar Chronograph isPatek's first in-house chronograph movement. The 40.5mm case is inlaid in Platinum and features agrey anthracite dial with day, date & month displayed in apertures and achronograph with both the 60-minute and 12-hour counters combined. It is protected by a sapphire-crystal and comes on a brown alligator strap with a platinum deployant buckle.