Chapman Proofs are exceedingly rare and it is unlikely that you have one. Did you check to see if your coin matches the known die markers? http://www.vamworld.com/forum/viewtopic.php?t=2392 https://coinweek.com/auctions-news/...lver-dollar-to-be-offered-at-summer-fun-show/
It has all the die markers from what I can see. I hate to get my hopes up though, is there any way it can have all the markers and not be a Chapman?
You have the wrong reverse hub type. The Chapman proofs all have the D1 (17 berries) reverse while yours is a D2 (16 berries). Search Heritage archives for Chapman proofs. There are several, and you can see some die scratches in common on may of them.
@john65999 You can read about Chapman Proofs here: https://auctions.stacksbowers.com/lots/view/3-2UV7T/1921-morgan-silver-dollar-chapman-proof-64-pcgs
IMO it's very possible to have all the markers and not be a Chapman. I'm just basing my opinion on the idea that it's doubtful that special dies were used to strike just a small number of proof coins, then discarded. Especially since the US Mint didn't officially strike any proof 1921 Morgans. (From what I've read about them the number ranges between 15 and 63 Chapmans). After seeing your other post asking if this is a Zerbe, I deleted the last sentence of this reply.
This is an honest-to-god question. Are the attached pictures considered die markers? Haven't seen many other 1921 Morgan with those hairlines under the "P"
That's a 17 berry (D1) reverse. Not that PCGS or any other grading service can't get stuff like this wrong. I had to break it to them several years ago that they called a 78 Rev. of 79 a proof that wasn't. Those are worth more than the 1921 Chapmans.
I believe that the number Chapman proofs are estimated at less than 50. To stumble onto one without provenance or even a plausible story (bought it from an old collectors estate, etc), makes the probability of very, very low. Add to that, coins like Chapman proofs, are hard to ID from pics and die markers are tough to show conclusively through pics. That puts you up against lottery odds for finding one. In addition, an extremely well respected and knowledgeable Morgan expert doesn't believe the coin is a Chapman, I don't think additional pics are going to convince anyone. If you are really certain, it's a Chapman, pony up the cash and send it for authentication. At some point, you're going to have to send it in if you ever want to sell it as a Chapman.