Welcome to the forum! All of the original 60's GM 14 x 6 wheels had an external (code) marking. Later, sometime around '68, they also began receiving an external date code. On '65's, for 14 x 6 GTO usage, believe its an A stamped next to the valve stem. If you are trying to compete in GTOAA Concours class, the wheels are looked at, & the code will be visible if the car is equipped with poverty caps. Mention all of this, as your earlier post https://www.gtoforum.com/f92/wtb-1965...wheels-123314/
added a little more info. Will mention, many of us have found on bulletin board sites its best to just post one Wanted Post, & occasionally update it. Some sites have a bump rule.
On your Wanted Request, mentioned it while networking the other day to a good friend & Concours restorer who is heavy on '64-67 cars, Judges & parts. He noted, he too is looking for a few more early 14x6's for a '65, as well as some '67 "6" stamped 14x6's, all for ongoing projects. Also mentioned to another parts contact & he is ck'ing his stash. Have had the A stamped 14x6's in the past, currently have nearly 150 original A & F-body wheels in the stacks, but have a strong feeling I don't have a set of "A" stamped 14x6's. Since you are in Maryland, you might ck Ron @ Potomac Pontiacs, as he's local & has a deep stock of parts. Strike out there, feel free & post back, parts come & go.