Those tic marks are probably frame markers for motion picture film. My guess is that is is DuPont 931. I don't have any data for it. An approach would be to load a short roll and bracket some exposures around EI 250 (say 125, 160, 200, 250, 320, 400). Develop it like you would Tri-X, and see what you get. That will give you a baseline or further experiments to adjust the speed and development time.