Hi Terry, I also own a Green re-babbitting and boring jig. I will add some photos later. John Green and Sons started in Freeport, Il. they were later purchased by Simplicity Co. of Port Washington, Wi. Siplicity sold other forms of babbitting equipment. Simplicity I believe was later joined with a company in Connecticut called Waterbury. They also sold babbitting equipment and seemed to possibly be merged with Ammco, a company in Chicago, Il. called Automotive Machinery Manufacturing Company. Ammco had also purchased Hempy Cooper of Kansas City, Kansas. Hempy was an early company which made babbitting appliances, connecting rod boring attachments for lathes and many forms of babbitt pouring jigs for rods and cap bearings. Your machine looks like it is missing the fine thread feed nut which allows the fine feed to bore the bearings. I will attach pics if I can of Simplicity equipment if I can.