ANH: Could be early or patent folmer... there's no way to know unless images pop up showing the bottom can. Even still it could have been a mash up. The simple saber spinning bladed stunt had an early folmer thin knurl button on it... which COULD have been swapped from the hero prop... SOOOO... we don't know if the Hero was a folmer patent, with a long knurl button, or an early one that had the short knurl swapped out.
As for many being made, I don't subscribe to Roger's memory on that for ANH. There's no evidence to support that at all. His recollections are easily debunked in some cases based on photographic evidence, call sheets for props, and the actual materials we now KNOW were used vs. his statements. I'm not calling him a liar, but I am saying his memory of something he was doing quick and dirty 40 years ago is muddied by history, AND fans feeding him theories and information over that time as well.
For ANH, I can only confirm the one single hero prop. It's easily traceable throughout filming and post via photos. The pins are straight, but I can't see well enough to tell if they're early round top pins, or folmer patent half sharp top pins. There IS a difference that came into being some point in the transition.
ESB: This gets much more complicated.
There were at LEAST two hero belt hangers, and those have changed or been altered since filming. Couple that with the stunts, the dagobah, and the one that became the vader bladed stunt in ROTJ, you've got a lot going on.
We know there's at least ONE bottom that was early folmer used in the wampa scene close up.
The RANCH saber WAS one of the belt hanger heroes.... or at least the bottom can WAS. it's easily screen and photo matched. The rest of the ranch saber doesn't seem to match the rest of the secondary belt hanger hero from the clamp up. The ranch bottom can IS a folmer patent 100%. Soooo... the top and clamp being swapped out at some point, and then the new one being redressed with that horrible textured tape means, we have no clue where the original clamp and top went.
on graflexes in general, the earlier flashes tended to have a more shiny surface finish, with the later ones having a pretty consistent brushed finish. The clamp stamping seems to have changed a little over time, and not exactly sure WHEN the letters started getting painted.
TFA/TLJ: I don't give enough of a crap about those movies to delve into the props in detail.