Could be Cadillac or LaSalle from 1928 or 1929. A Cadillac has 30 hood louvres and a LaSalle has 28 - somehow I don't think we will tell by that method!
I can tell by the frame rails that it's not a Cadillac. I doubt it could be a LaSalle either; the '29 and '30 models had twin-bar bumpers, front and rear; also the leading edge of the front fenders on both Cadillac and LaSalle models of these two years were much more the shape of a clam shell. As to the body style, it's a 5-pass. town sedan (recognizable by the trunk AND the additional folding trunk rack).