The base of the generator is wider than the canister, and most of the pictures I found online don't have that wide base. Terry is right with the Model T's! I just found a picture of a Model T on this site: 1914 Model T. So it looks like they used that style generator from 1908 to 1914. When I do an image search on Google for 1915 model T's they no longer have the generator. So "1937hd45" is also totally right on the pre-1915 autos. Thanks guys for the info, you guys are good! -Tom