Omega 188.0001 Speedsonic Lobster Chronograph, box and papers

The Watch: The Omega 188.0001 Speedsonic Lobster Chrono. The Speedsonic is interesting for several reasons. Firstly, it has a hybrid electronic/mechanical tuning fork movement based on the Bulova Accutron design. The incorporation of this movement into the Speedmaster range was a radical departure from the trusty calibre 321 and 861 (manual wind) or 1040 (automatic) mechanical movements hitherto used. Watches with tuning fork movements are relatively rare these days, and Speedmasters with tuning forks even more so. Omega went on to make Constellations and other models with the f300 Hz movement, and even used an f720 Hz movement which delivered even greater accuracy. 44mm.