Black blanket appaloosa with either a front right sock, four socks, two socks or no socks. In 1977, this model was advertised as Stud Spider #66 and from 1985-1989 just referred to as Appaloosa #66. The white picture box from 1978 timeframe is very difficult to find.
From 1978-1983, model was released in the Stud Spider Gift Set #3080 with the paperback book "Let's Go to the Races with the Appaloosa" by Jim Brolin.
That same set was actually available through JC Penney in 1977, and included leg wraps for the model. However, the model pictured in the catalog was a test model of the Appaloosa Performance Horse with a slightly different pattern, JCP #926-6446. The regular Stud Spider model was included in 1978 marketing items.
See separate record for information and photos about the Sears releases.