I have one of those PBM-08A12M, it came out of a power supply IIRC. I don't remember where I put it at the moment, but do recall it... good fan, like an L1A essentially but the old soldered-on lead style instead of the swappable pigtail they use on many other models, and it is the sleeve (uhh, "hydrowave") bearing like the more common L1A.
The one I have also has the yellow label (well, it DID have a yellow lablel but I think I lost the lablel after removing to see what kind of bearing it had, as I also couldn't find any details on the model with a search engine). It seems to be a fine fan, just higher RPM (and accordingly a bit louder) than the L1A, which it ought to be, since it's an "M" instead of "L" spec. Those "M"s are pretty hard to find, usually you only see the "L" or "H".