Thanks for both of your responses. I had not thought about a 24". I checked and you are correct that it is 17" to the top of the seat mast. But, inside the front fork and the rear wheel well is a full 14" up to the fenders (that are still on the bike). I have a 1939 Men's Standard with tank. This looks like a "Double Bar Roadster" from that era with a straight, single, lower bar. I know that after '58 they had twin lower straight (or slightly curved) bars and others like the American, Speedster, Tiger, Typhoon, etc. had cantilever twin bars. My biggest question is did any other model in 1958 look like a "Double Bar Roadster"? Thanks again.