I have searched and searched for info on this machine til my eyes are about to fall out. Here is the most info I have been able to glean:
The New Williams Sewing Machine was made by the Williams Manufacturing Company (W.M.F.C.Co. - as it says on my treadle base). The W.M.F.C.Co. began in 1863, but sources cite different dates when this company ended. Here we are told that the company lasted until 1899, however, I suspect that they have confused the dates. At the McCord Museum we are told that the fine fellow that did this beautiful engraving died in 1899. And here we are told that the W.M.F.C.Co. liquidated in 1929.
There are no identifying Serial or Model Numbers or anywhere. The slide pates are missing so there may have been a patent date. I will locate a picture of it as well as the engraving of the underside (these are the parts I need or subsitutes for them) and try to figure out how to upload them. Be right back. Thanks for your interest and help.