Which type of mustang is my horse?

Your Mustang can not be a Kiger Mustang, they come from the Kiger Valley in Oregon and only from there so your mustang would have to be the BLM mustang which did originate from the Spanish Barb Horses. Your photos are not viewable. The Kiger Mustangs are almost all Duns, Buckskins, Palominos, and Smokey Blacks.