The term “Super Compressor” is one that is quite often misused these days. Most people associate Super Compressor (SC) with any watch that has dual crowns and an internal rotating bezel, but it’s not that simple. Super Compressor is a trademarked name for specific case designs made by the case manufacturer Ervin Piquerez S.A. (EPSA). They designed a patented case sealing method that actually became more water tight the deeper the watch went. The deeper you went, the more pressure was applied to the case-back, pressing it against the O-ring gasket... Read more...

How is the Vostok Amphibia case different?

It is my understanding that it is similar but have never seen it described as a SC case.

Very interesting information. I have been looking at vintage divers, but was unable to zero in on what I wanted. This helps greatly, thanks.

Very good read.