Over 100 different brands used one of the many variations of super-compressor cases. More depth equals more water pressure equals greater seal. The design takes advantage of the water pressure the case is exposed to at depth to press the case back against the o-ring seal. The bezel was oil-embedded which guaranteed a long lifetime and watertight seal.Įnicar Sherpa Ultradive Super-Compressor refers to a patented case sealing method developed by watch case manufacturer Ervin Piquerez. The Enicar Sherpa Ultradive was rated water resistant to 200 meters due to its patented back. ![]() 1964 Enicar Sherpa Ultradive 144/35/03 Super-compressor 40.3mm.
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