To be honest, I don't know if it's an Elgin. The fella I bought it from thought it was, but I don't think he was too sure either. I haven't been able to find an Elgin that looks like this one. I have found similar Higgins, Schwinns and perhaps a couple others. He did mention that it had a skiptooth drive when he started working on it. I would guess the age could be in the 1930 to 1950 range.
If you have any knowledge of bikes in this era, I would be all ears.
I would love to do an in frame tank and drum brake. I think the drum is more of a neccessity. The coast really doesn't cut it at the speed this bike is capable of.