GAZ- AA - rear canvas hood frame

[Larry Hayward]

Has anyone got a photo of a GAZ-AA with the canvas hood frame in place but without the canvas in place? I would like to see how the frames were located and whether these frames consisted of just four hoops.

Also when did a GAZ- AA become a GAZ-MM? Was there an intermediate stage when a truck could be called a late model GAZ-AA, say with flat mudguards but then be called a GAZ-MM with a wooden cab and very basic fittings?