ReluctantDecoy
NES Member
Thanks for the info !
Worth pointing out that there was just a relatively small period of time of preban square notch production, and they continued with a similar design postban, so it is definitely trickier to confirm preban from postban square notches. There are several threads on this forum about this very topic, to the point that several vets on this site probably get nauseated thinking about it. The u notches are easier to understand as they are all preban if they have a "U" notch.