BB radiator question

Thank you for the info, but maybe the pics are not that clear, (or my question, lol).

The radiator I have is stamped 2949065, as is the one in the other pic.

Mine however has a tag on top of the number 2949065 that appears to have been stamped along with the number on the radiator, 2949065.
The tag fits in the rectangle where the number is stamped.

On the left side the tag is coming up and I can see the same number underneath. Both the number on the tag and the number on the radiator line up perfectly, (at least on the left side where I can see under).

It's definitely a 69 BB radiator, I don't think anyone is trying to place a tag on top and fake something- just seems strange and I was wondering if that was a common practice in 69?