Super compressors

Super compressor is the name of a case design made by Ervin Piquerez S.A. located in Suisse. EPSA produced the cases and they were used by more than 100 different watch brands from the late 50s to the early 70s.

Excellent articles and introductions to super compressors at worn&wound and scubawatch.

Watches with super compressor cases are some of the most cool looking vintage watches. Most often they had internal bezels and thick domed crystals.

They are affordable but not cheap. Typically the price is from 1.000 Euro and up.

Wittnauer, Bulova and Hamilton super compressor divers.

But how big are they?!

Supposedly the super compressor cases were made in two sizes: small 36 mm and large 41 mm -according to Worn & Wound. Scubawatch lists the large case at 42 mm. And some models at eBay or Chrono24 are described as being 43 mm. Now we are talking!

Not all watches described as "super compressors" in sales ads are in fact the real deal. Super compressors have easily recognizable features like cross-hatching marks on the crowns and/or the Super Compressor helmet-logo on the inside and/or on the outside of the case-back:

Source and source.