Look up NEEDLEBAR on google and you will find copies of manuals for lots of old machines, lots of pictures of machines too and lots of stories of the companies that made them. Singer has a site with all the serial numbers on it for their machines which identify when made, where, how many etc. I have not seen one quite like this before. Another site with lots of help for old treadles and also patterns for quilts to do on them and handy hints is Treadle On, in USA.