Anybody recognize these 340 pistons?

What about the eighth bore? Maybe you meant bore sizes and without looking I would GUESS (only a guess) 5 bore sizes,you obviously have it figured out (its in a book so how could it be wrong??????) I cannot type that fast so explaining this to you would take to much time. And yes i do know!!!!!!! Anyway just wanted to help this person with their Question but feel free to take over from here.