So last night I went to my mother's house and opened up the cabinet to my Grandmommy's 1940 Singer 66-16. I oiled it, installed a denim needle and plugged it in. I threaded it and it sewed through eight layers of denim like butter!
My mother brought it to me today and I made this wallet with no problems. The stitching is even and beautiful. This will be my main machine from this day forward for making wallets and handbags. I have named her Edwina after my grandmother. I know Grandmommy is smiling down on me.