Originally Posted by MakeMineA10mm
IIRC, the first serial number prefix of Glocks that was shipped into the US was "AF," but this is going off memory...
I doubt Glock will know or tell you. They are NOT a collector-oriented company. I believe the Glock Serial Number Research Thread over in the "Valuable Info" Forum has the first ones imported annotated. You could take a gander over there.
Thanks, I'll take a peak over there. I got busy yesterday and didn't call Glock, but I bet you're right in that regard.