Which breed of horse is this?

When I was 6, my brother-in-law to be, gave me a steel gray, dapple gray, appaloosa. He was a stallion and very gentle, for a stud!! I barrel raced him when I was 11, at the county fairs. I still have my ribbons!! When I got pregnant and quit competing, I sold him for $10,000 and he was still a stud. That's why I got so much money. This was in 1973. He would be worth much more today!! SIMBA!!