Taking inspiration from the very first Speedmaster CK2915-1 from 1957, the Speedmaster Calibre 321 Chronograph epitomises luxurious timekeeping, with its 18K Canopus Gold™ finish, incredible functionality, and inspiring design elements. Designed to celebrate the Speedmaster's 65th anniversary, the caseback is engraved with a seahorse design featuring a blue sapphire for the eye, while the crown features the NAIAD symbol as seen on some of the very first CK2915 models. This unique 38.6mm model pairs an 18K Canopus Gold™ case with a paired with a 18K Canopus Gold™ bracelet with a comfort release adjustment system. The bezel presents a tachymeter scale filled with black enamel and the famous dot over 90, as well as a dot diagonal to 70. Bold and commanding, the deep black onyx dial boasts 18K white gold hands and indexes, three sub-dials including a small second’s display, 30-minute recorder and 12-hour recorder, along with a central chronograph function. Delivering flawless precision, the 321 calibre movement is officially certified and offers incredible performance. This special edition watch is presented in a wooden box, lovingly crafted from tulip tree and inspired by the design of the original Speedmaster boxes.