Stainless steel OMEGA ref. 145.010 Genève 'Drivers' chronostop wristwatch. Made 1970

The OMEGA Chronostop was launched in 1966 made to complement the Seamaster collection before being transferred into the ''Genève'' collection in 1967.

The Chronostop was created with modern and pure lines with a sturdy and water-resistant case. The dials were predominantly black with white luminous markings, flanges and rotating bezels.

Despite the low price, the Chronostop was a premium model. The watch’s movement seemed simple, but it was a high-accuracy, high-beat, high-quality engine, essentially a simpler version of the movement that powered the Speedmaster. Omega used two movements for its Chronostop models: the cal.920 (with a date), and the cal.865 (no date). Both manual-wind movements had 17 jewels, run at a rapid 21,600 Bph, and were used only on the Chronostop.

Unlike conventional chronographs that record seconds, minutes, and hours with two or three subdials, the Chronostop was designed to be used for short interval timing -- less than one minute -- with a central hand for seconds and a single pusher.