This watch is a bit of a departure from Orven's usual products, although the basic premise of rebranding an imported watch is the same. 'Super-Compressor' refers to a patented case-sealing method by Swiss watch case manufacturer Ervin Piquerez S.A. (EPSA) which used water pressure to compress the spring-loaded casebook onto an o-ring, sealing the watch tighter as the water pressure increased with depth.
These high quality EPSA cases were used in dive watches by high end manufacturers including Longines, JLC and Zenith, and many smaller brands such as Droz, Olma, Enicar and Baylor. Each company chose their own combination of hands, bezels, dials and movements, but the case with its signature cross-hatched crowns usually remained unchanged. Whilst this method of waterproofing cases was effective at greater depth, it was not as successful in shallow water which, in combination with the necessity of operating the crown underwater to alter the timing bezel, lead to many of these watches being affected by water damage. |
us2968911_-_patent.pdf | |
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