The Fortis Marinemaster Ref. 6237 from the 1970s is a true vintage diver’s gem, instantly recognizable for its bold decompression table dial rendered in vivid red, orange, white, and black. Housed in a rugged “super compressor” case by Ervin Piquerez S.A. (EPSA), it features dual crowns — the lower crown at 4 o’clock for setting the time, and the upper crown at 2 o’clock for operating the internal rotating bezel. The screw-down case back proudly displays the EPSA diving helmet logo along with the model’s details, underscoring its professional-grade heritage.

Powered by the reliable ETA 2472 automatic movement, recently serviced for optimal performance, this Marinemaster remains in excellent condition and stands as both a functional tool and a vibrant slice of dive watch history.