Launched in 1957, the Ventura introduced a completely new technology to the watchmaking world, battery powered wristwatches. Well before the rise of quartz watches, the Ventura was the first watch to bring a new type of energy source in the bowels of the wristwatch. In fact, the Ventura was powered by the Caliber 500, a construction combining the battery powered magnets and a traditional balance wheel, a fragile yet completely new way of powering a watch.