From the tank badges I would guess Triumphs but too hard to see properly. Ce sont des Triumph. Une des motos est plus visible sur l'image ci-dessous /vehicle_153526-Citroen-15-Six-H-1957.html
Probably Speed Twins - 5T - but they could also be 3Ts.
It's a Moto Guzzi single, but it's hard to see which model, could be a 500cc GT from '30s, a 500cc GTW from the '40's or a 250cc P model from the same years