In testing the watch over five months in 1953, he carried out 132 dives off the coast of the French Riviera, which took him to depths of between 12 and 60 metres (40 and 200 feet).

Rebikoff’s report was very positive: “We are able to confirm that this watch has not only given entire satisfaction in diving conditions which were extremely tough and particularly dangerous for the material used, but that it has proved an indispensable accessory for all diving with independent equipment.”