Wow Funny about the college reference. That was nice of you to lend it to the school.If you look at the top of mine left side you will see some yellow markings. I loaned my machine to the local college for awhile, kinda payback for teaching me to weld I guess and the welding teacher was a very good person. They wrote my name on the top of the welder. My daughter has said her name is on my welder when I check out.