I found another 1972 doubled die in the same box. This one has the same doubling as the first one but, the "2" in the date on this one has some doubling on the "2".
I really don't know much about the 1972 DDO, but I do know there are many varieties of 1972 DDO cents, some of them worth a bunch, some not. The latest version of the Cherrypicker's Guide shows 9 different 1972 DDO varieties, but there may even be more than that.