Hello Dave, as I remember Acco Page wires were an Airco trademark. So, as I'm sure you did, I tried various combinations of searches to find information on the numbering that you listed, nothing came up. I am curious, have you put this wire on any of your machines yet and run any to see the results? Another couple of questions, is it magnetic and does it look similar to mild steel wires of other manufacturers or is it a strange one? If you can run some of it and see if the weld deposit is soft, hard, malleable, cracks through the center of the weld or down the edges, etc. at least this might answer some questions for you. Best regards, Allan