Good enough for me, friends. It was found in a local park, however it was near the park propertyline that joins a very old farm. But I am still open for any ideas, because I've never found a tag that big.
It's definately aluminum and appears to be a Hasco. I'm hoping to contact then real soon just to see how old it is. Poor cow had to have one ear longer than the other. Any ideas on how well this would door in an electolysis bath?