Speedmaster Broad Arrow

In Context

At 38.6 mm it sits just under the modern norm — the band that suits the widest spread of wrists. The case back is closed, so the movement stays out of sight, and the plexiglass crystal scratches easily but polishes back out at home, which sapphire does not.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 44 hours of reserve carries it overnight, but not through a weekend in a drawer. At 18,000 vph the seconds hand advances 5 times a second, the slower and more audible rate of an older design.

CK2915-1 is one of 2 executions of the CK2915 base reference. Underneath they are the same watch; what separates this one is a black dial and a stainless steel case. Introduced in 1957. Beyond the time it carries a chronograph.

Chronograph movement with column wheel based on the Lemania 2310.

1 other watch in the library runs the Omega 321.

Omega

Speedmaster Broad Arrow

CK2915-2 · 38.6 mm