Never heard about this one before, so cool.
The Film Compax is distinguished from other UG chronographs by its purpose-built outer scales. These red and black scales are designed to indicate the amount of film used in feet per second: red for 16mm film and black for 35mm film, calibrated to the old industry standard of 24 frames per second. The three o’clock subdial has additional markers to keep measuring the amount of film used in feet per minute.
🚀 Hands-On With One Of The Rarest Universal Geneve Chronographs, Ever - HODINKEE