Ah makes sense. So old blue is looking like a 1951 Schwinn with some Western Flyer accessories then.
Thanks for the picture! You’re right, that dropout is definitely different, but the number matches up and the rest of it does look really similar minus the tank, rack, and springers. I’ll post it onto that Murray thread and see what comes back.
I'm still thinking that Schwinn is an early post war piece. I've been researching the evolution of Schwinn's electro-forging of their frames and that brings me out of the war time pieces and into the period when Schwinn started building retail balloon frames during 1945. Your serial number series H12345 was used in 1941. It's said and is fact that the prewar numbers were also used in 1946 along with the A and B series. The fact that nobody has seemed to take into account is that Schwinn was producing bikes for retail sales in 1945. These first post war models built in 1945 and some even say 44, were the first to have the chain stays EF'd to the BB shell and that process was a learning period for Schwinn. I've also noted there are two kickstand tube angles on these early post war pieces. Yours has the earliest version, but since that is a 24" frame that may be irrelevant. I doubt the crank has a casting date on it, but it's worth a shot taking a look and see if there is.
This was todays find. What year would this be. The wheels on it are not correct. The guy I bought it from may have them in his grandfathers barn. I would guess balloon wheels before midleweight. It had a headlight on fender. Bars are not correct too. I have balloon wheels that would work but...