Leather western saddle, breast collar and bridle. And a braided piece of leather - lead rope(?).
Set #3910 was released from 1977-1978. This set appears to have a longer fender, and I think these were all the 'fuzzy' texture. Please contact me if you have a photo you can share.
Set #2355 was released 1979-1986, and has a much shorter fender. Some of the early releases had that same 'fuzzy' texture, while later (I'm assuming around 1980), the leather was smooth.
In 1978-1979, released through Sears on the Stud Spider model as the Appaloosa Stallion with Western Tack #49N2184 (Breyer #6610 on box). Based on the catalog photos, 1978 showed a saddle with a longer fender, presumably #3910. In the 1979 catalog, the saddle set #2355 with shorter fenders was shown. In 1983, it was sold by Sears only with the Western tack #2355, as Sears #49C20120.
In 1982, this tack set was available without a model through Aldens as #83Y3659.