1950–1969 Electric watches

The first generation electric-powered watches came out during this cartier roadster period.
   These kept time with a balance wheel powered by a solenoid, or in a few advanced watches that foreshadowed the quartz watch, by a steel tuning fork vibrating at 360 Hz, powered by a solenoid driven cartier roadster watches by a transistor oscillator circuit. The hands were still moved mechanically by a wheel train.
  In mechanical watches the self winding mechanism, shockproof balance pivots, and break resistant 'white metal' mainsprings became standard.
 roadster cartier watches The jewel craze caused 'jewel inflation' and watches with up to 100 jewels were produced.