In the sixties the quartz watches did not exist. All models manufactured at that time were provided with mechanical winding or self-winding automatic movements.

The first Aquastar diving watch, called BENTHOS 500, was waterresistant up to 500 meters. This was a real performance that was possible due to a new technology which consisted in the development of round o'rings. Before, the use of  flat o'rings didn't allow to obtain a significant water resistance.

To test the water resistance of a model at different depths, the manufacturer had to embark on a boat and fix the watch at a fishing wire which they immerged  into the water, noting meter by meter the depth reached and to what extent the components resisted successfully the pressure of the water.

BENTHOS 500		REGATE