Released in 'Amazement's Riding Set' #95104 that included Darla the rider doll, plastic English tack with red saddle pad, brush, comb, stickers, bucket, tack box, trophy, blue ribbon and story book.
Also released in the Deluxe #95106 and Deluxe Rider #95107 sets. See photos for all the accessories.
Available through Sears as #17374 in 1996. "Dapples Horse Family, Rider & Tack. This delightful family has luxurious hair to comb and braid. Set includes pinto stallion, proud mare and colt, Sunny. With saddle, bridle, saddle pad, brush, comb, bucket, tack box, blue ribbon, trophy, star ring, necklace, stickers, and rider Daria. A mini story book tells the exciting adventures of young Sunny." From the Sears catalog.
Side note: The mane varies based on the packaging the model came in. The single model appears to have the mane all on the left side, but the sets show models released with mane either on the left or right side. Also, the hair on these older models is very fragile, combing them out could cause the hair to fall out. The tack, if left on the models for too long, will stick to the model and cause paint damage. The saddle pad color can also stain the model.