Goodyear polyglas tires??

[69SSRSL89]

I just picked up a set of used Goodyear polyglas tires and I was wondering if they where originals or reproductions? There where numbers stamped into them. AUNCL8DS was stamped into them all. Then there was also a three digit stamp in them. Two where B38, one was H38 and one was B37. These tires are the style that have the tire size in white letters also and I have been told that this was for 70 and newer. One of the reasons I think that they might be originals is because they look to be recapped. Does anyone know anything about recapping of these tires and if they are trustworthy to drive with. I don't put a lot of miles on but don't want to be affraid to drive with them either. Any help would be greatly appreciated. Thanks guys. Jesse