Registered a couple weeks ago & thought I'd best introduce myself. I've a Simplex frame, no engine, just acquired & have started gathering information and parts. Reading this forum and your posts has been very helpful, as has seeing the excellent results of your dedication in bringing new life to these wonderful little cycles. Very inspiring.
The frame is #16683 & in checking the registry I'm thinking 1957, although I was told by the gentleman who had it in storage for the last 35 years that it was a 1941 model. It was missing drive train and engine when he acquired it and it sat in the barn all that time. He was probably told it was a '41 & he was just repeating that information.
I'm not going to restore to original, rather I'll modify and hopefully retain some of it's original character while creating a bike that is both safe, reliable and fun to ride. Rick C.