I had an arab mare like that. Honestly, I'm not a fan of arabs (I like a little more bulk under me, LOL) but she was on the bulkier side. I got her when she was 6, and she had papers, but they were never processed. After a little research, I was told that the owners of the Real McCoy, used to keep a large herd of mare offspring in the mid 80's. I never did get the story as to why all the paperwork was completed, but never filed. All the mares had "registered" names though.
As far as she was concerned, she was drugged when we bought her, as she had a few....issues. We had written up a pre-purchase/sale contract stating that we had 2 weeks to return her if she didn't pass the vet exam for any reason. Like idiots, we sent her the 2 copies to sign and she made a copy ommiting "for any reason" and replacing it with "for physical reasons". We had typed it out on a typewriter (some of you may know what that is) and never considered someone would re-type it. Either way, we were stuck with her.
After about a year, even though we were making good progress we had hit a plateau in training and available funds. So we found a very nice lady who had a gorgious spotted pinto-arab stud, and she wanted her as a broodmare. She was registered with the Pinto assoc, and became a brood mare. A VERY good one from what I understand, having babies is what she was meant to do. Last I heard (mid 90's), 1 or 2 of her foals had won several world halter titles.
But I always wondered what the history of the McCoy line was/is, what was the real story with her registry, whatever happened to her, and what about her babies. (I lost track of her before the internet era, ) and never seriously thought about asking again until HF.
Sorry for the novel, lol. Oh, she was foaled in 1985, sire was Real McCoy, breeder was the McCoy farm (whatever the name was), and the name on her papers was One Classy McCoy