Nah, He'd be braggin'...and rightfully so. But I have a fair idea, based on the reference to the Ben McCullough Colt Dragoon pistol.
But I'd reckon the REAL holy grail would be any of the three known Bowies recovered from the Alamo, one of which is probably the James Black original. Of course the pair of .36 Colt Paterson revolvers owned by Nathan Bedford Forrest when he arrived in Texas as a youngster might be of particular interest as well....