AFG Gregoire prototype. Experimental car with cast alloy chassis and aluminum air cooled twin. After long story it ended as a prototype at Hartnett Australia. The Panhard Dyna X used some ideas and experiences and made it fit for mass production. Gregoire -of course since you know his temper- sued Panhard and had some success in that after many years. Delagarde's Panhard engine was distinctly different (more modern hi-rev motorcycle type). The AFG's alloy frame was beautifully engineered but very complicate/expensive t build. Bionier made a clever combination of the Dynamique experiences of subframe and monocoque...