when a coin has a transition period , it means its been changed /altered/ or updated in some way,,, examples : the close AM and far AM changes on obverse - or 1982 headache transition, small date large date , wheat penny to the memorial penny,, these are just some of the transitions ... when they happen, your c chances of finding the old transition that next year even know its been changed,,, ,, dont quote me tho,, im just a noob