The American Paint Horse Association was started to preserve the pedigrees and records of Quarter Horses born with excessive white which were being excluded from registration. At the time of the founding of the club, the registration books were "open" and if a horse passed inspection and was decided to be "of quarter horse type" and had the qualifying amount of white in the right places it could be hardshipped registered. During this time a lot of tobiano horses were added to the books, which we now know can not possibly have been pure cropout quarter horses, because tobiano is a dominant gene. To my knowledge there is only one registered tobiano quarter horse, forget its name, but it was probably fifty or more years ago, and probably misrepresented at birth. It was a successful race horse, a mare I think... She had no registered tobiano offspring to my knowledge.