In 1976 Breyer expanded the Stablemate line to include a pair of barns and a play set. The most elusive of these items was the #7100 Wooden Stable. This rustic barn and corral was only shown in the 1976 catalogue and its exact production dates are uncertain.
Though this set looks quite sturdy and detailed, the Breyer History Diva reports a disappointing lack in quality. Maybe it's fortunate they're rare.
The most sought after variation in this run may not even exist outside of the model used in the 1976 catalogue picture.
When the Stablemates were released in 1975, there was only one actual picture of a model, the dapple grey Saddlebred; behind him were drawings of three families, a mixture of the Arabian Stallion, Arabian Mare, Thoroughbred Mare, both Thoroughbred Foals, and the Morgan Stallion (who wasn't even due to be released that year).