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The Chronostop is an interesting side note in the history of Omega chronographs.
Manufactured in the late 1960s-1970s with a few different case orientations and movements, the Chronostop offered the functionality of a 60-second stopwatch feature, operated from the single pusher located above the crown. These watches were designed to be worn under the wrist, making them popular with drivers. The Chronostop introduced a press and release stop-second feature, engaged by the single pusher at 2 o'clock. To start the chronograph, the single pusher is depressed. To stop it, the pusher is depressed and held, and then released to reset.
This particular example is completely original, driven by the Calibre 865 manual-wound movement, and features nicely patinated blue dial with original handset. Its size, dial design, and unique functionality make it an interesting conversation piece and collectable timepiece.
A video by Hodinkee explaining the history and operation of the Chronostop can be found HERE.
More information on the full Omega Chronostop line can be found HERE.
Steel case is approximately 35mm (excluding the crown). Omega reference 145.009. Calibre 865 movement.
Overall condition: Case is in good condition overall, showing some light signs of prior polishing. Original dial is in very good condition, with light, even oxidation to the polished hour markers and luminescent plots. Original hands, case back, and signed crown.
Includes one black leather and two 18mm Nylon Straps by Crown & Buckle.