Yup, I found reference to it in researching Jens Poal Andersen’s 35mm Cameras from Denmark circa 1916. The Pacht prototype still exists in Denmark. He never finished the apparatus to fully functional. I did. Story to come soon on forum. The photo was shot at about F6, a test roll, shows me to build an f16 stop for next roll! I reeealy like the camera and intend to get it as good as possible.