Super compressor is a trademarked name for specific case designs made by the case manufacturer EPSA ( Ervin Piquerez S.A ).They designed a patented case sealing methods that actually became more water tight. The deeper the watch went; more pressure was applied to the case back, pressing it against the O Ring gasket. Dial: Black & Silver BROAD ARROW Dial / Black Internal rotating bezel with silver minute markings to time diving times / Big Broad Arrow Hour Marker with matching hour markers / Date window at 3 O’Clock / Dial Marked: Plongeurs Case: SUPER COMPRESSOR EPSA ( Ervin Piquerez S.A ) Case. Brevet 317537. Case Back printed Inside: Big Divers Helmet Logo / Swiss Made / Super Compressor / Brevet 317537 / Brevet 337462 / 5 – 65 which dates to May of 1965. It measures approx. 36mm diameter. Cross hatching lines on both crowns. Movement: Swiss made Schild caliber automatic. Schild movement working fine and keeping time. Service history is unknown. Bracelet: New tropical rubber dive band. Price: EUR 400. Prefer ups express posting (EUR 43). I'm located in the EU. Banktransfer or other method of paying if buyer feels insecure. If I made a mistake, let me know. Thnx OF for the space!