To my knowledge its original hardware, doesn't seem like its been messed with before. Previous over ran it out of oil and I was wondering why and just found a dropped exhaust valve guide yesterday when I was going to put the head back on.
The markings are only on some wrist pins, I have a bucket at work I was going through, and without putting any through our parts washer I only found a hand full.
I need to steep up and buy a better micrometer tenths of a thousand would be rad to be able to see.