Omega · Automatic

1045

Omega's designation for the Lemania 5100, the automatic chronograph that ran through the tool watches of the 1970s and 80s. Its signature is a central minute counter — a long hand sweeping the whole dial rather than a subdial, far easier to read at a glance — alongside a 24-hour indicator. It replaced the 1040 in 1974 and stayed until the modular 1140 arrived.