I have learned it is a model 66, treadle, manufactured in New Jersey in 1916. The mechanism is very smooth, the castings were in great condition, all the parts are there, including the original belt and the manual! The wheels are there and in good shape. This machine has been stored well, used, but not for a long time. I Have superficially cleaned it up but I need to get a new belt and the only thing I can’t locate in the box of accessories is the thread spool pin. The inside of the machine was lint free and spotless. I haven’t touched it with water or cleaning solvents. Just sewing machine oil and an old t-shirt. My fingers are sore from rubbing but it is shining up nicely. I’m very excited! I am having difficulty putting the bobbin cover on. It was in the box of accessories. Any suggestions?