This question has weeded out the posers for me several times. I ask mainly because I love hearing stories from UPT/Primary. The USAF types almost always smile and spout off their class number when I ask. Not a guarantee that the ones who reply, "I don't know....that was a long time ago" are phonies but it does raise the antennas a bit.

Sounds like UPT classes went from year and letter to year and class number sometime in the 60's. Also seems that being a FAIP at Williams was one of the best jobs a 24 year old could ever ask for.