I picked up an Optique & Précision de Levallois (OPL) Foca PF3 a while back, and there was undeveloped Kodak Tri-X in it. The images seem to date from the 1970s and were taken at what appears to be an outdoor kids activity fair.
Sample images on Kodak Tri-X from the 1970’s, cold-stand developed in Kodak HC-110 for 30 minutes, scanned with an Epson v550.
