slant 6 main bearings

I had a thread about 1-1/2-2 years ago on the slant 6 forum about that very thing. I ended up buying another set for as cheap as I found them. I messaged the seller and they said "they sell lots of sets of bearings with such markings to machine shops and there's never been a problem.
Mine i could catch a fingernail on the failing coating. For the small percentage of the cost of a rebuild vs the chance it could cause the rebuild to fail, it wasn't worth taking the chance on questionable bearings. I might even still have that set around here somewhere