The As Box is a simple box camera produced for the French company As de Trèfle c1950. It takes 6x9 size images on 620 film. Apart from the shutter lever and film advance key, the camera has only one control, the pull-tab on the right-hand side, which presumably selects 'I' or 'B' shutter. It has Watson-type viewfinders.
Notes on the camera at Collection Appareils suggest the camera was made by Mecaoptic, who made a number of box cameras.