A T-650 corresponds to the 1950 model year. The Special Interest Group Leader for Lauson is Don LeJuene in Jarreau, LA. If you contact him, he might be ale to guide you to a manual.
PM T2
He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...