Wyatt before he died, 1929, left all of his personal stuff,guns included , to his long time friend, John H. Flood Jr. Flood was a personal friend and business partner of Wyatt's for 25 tears.(1904-1929)
Wyatt was one of those people who saved everything,reciepts, tickets, news clippings, etc.. Among these effects was a 1869 American S&W ,8 inch barrel in 44 cal. This was given to Wyatt as a gift from Tom Clum, Tombstone mayor, and editor of the Tombstone Epitath.
Flood claims that Wyatt told him that is was the gun he carried, the day of the OK corral gunfight. If Wyatt was going to a gun fight, it would stand to reason he may well take the S&W because it was so easy to reload, compared to the colt.
As far as I know that S&W is in John D. Gilcheriese collection which one of the largest collections in existance regarding Wyatt Earp. John D. Gilcheriese also owns an unpublished auto biography of Wyatt Earp, that was written by Flood.
For whatever reason it wasn't published, I don't know. But it was it may help clean up all the conjuncture surrounding Wyatt's guns, especially the Buntline that he was supposed to own, that Colt didn't build.
Aren't these tales of the old west great. Thats what many of them are, just tales