Spelter Cowboy/Buffalo Bill (?) On Horse (Clock Topper?)

I think this may have been a topper for a clock but it would have had to have been an awfully big clock. There's no holes for screws in the base so maybe it wasn't a topper. I have no idea as to age and I'm almost sure this is cast aluminum although it's heavy and I didn't know cast aluminum was this heavy; a magnet wouldn't stick to it. (I just did some more research and found out this is spelter which was often painted to look like bronze.) I don't know who the figure is supposed to represent e.g., some cowboy or Buffalo Bill etc. The figure has a rifle slung over his back and a lariat raised above him in one hand. There is some slight paint loss. Some red markings on the bottom of the base but I can't make them out. I don't know if these are markings however or just the undercolor showing through. It does NOT include a dollar sign though Im sure. Any info as to what this is and value and age would be appreciated.