The picture of the plug in/switch area looks just like my serger, JUKI, model MO-634DEV from the late 80's early 90's which runs perfectly, the once or twice a week I need it..............actually the front looks identical also. ok, so pulled it's binder off the shelf opened the parts list .... controller for U.S.A. is A6401-634-DAOA and warranty card copy says date of purchase was 05-07-1994.