I was at the local welding shop and asked it they had a used Dial Arc 250? No they said, but we have a really cheap old Airco 250 ac/dc that works well. It is an Airco 250 amp AC DC MSM Bumblebee II, SN HD695830. Has the amp crank in the middle of the front plate. Did a search on this forum, and found some similar units and links to the appropriate manual, but nothing exact. Will one of the wise members help me out on a really cheap deal? I am looking for the Miller manual that will match up. Thanks all, and I really enjoy reading this forum.