I know what they are. It's more complicated than just 4 pin. It's the location of the brass and steel pins, and the pattern. Mine is a 4 dot 3 pin. Which came before the 4 pin.

You ask this on the Buck forum, and you'll get many different answers.

Anyway, it's not that important. They're all 110's.

Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the outcome of the vote.