I recently purchased this bike at a barn sale. The tires are shot and the chain and pedals will need replaced. It is cleaning up nicely and appears to be orginal paint and surface rust. The problem is, after hours of research, I cant identify what I have. I thought it was a 1941 Dx. However, when I pulled the torpedo light top off, there are instructions for the light with what I believe to be a date of 9/48. Can anyone help?