Since White was made by Singer you can send this to them and they will tell you what it is and how to use it. I have two White Rotory machines and both were made in the 1920's. One was given to my mother by my father before I was born and the other I bought on Craigs List for $5 with all the attachments and cabinet. I had to call Singer to find out what some of the attachments that came with it. Good luck with your search.