The situation is like this. I go to the e(vil)Bay website and see a ton of ads where people claim this is PT57A. How do I know it really is?
I read somewhere that in the case of PT57A you have to take off the grip, the overgrip and the pellets to see what is on the hair pin. There should be some sticker or something that correctly identifies it. Other than that, while buying from the web I guess there isn't much you can do. right?
About H22 I know nothing.