[69L89396]

Thanks Greg,
That's exactly what I don't want to do, put a tag on the wrong radiator.
Alot of radiators I've seen have stamps on the tanks that seem to match the tag. I hope someone here on this site has one that can confirm this. There seems to not be very much information on this subject in any of the books I've seen.
Do the COPO tags match the tanks? There must be some pattern to the way they did this.