If sterling silver, that back of one of the conchos will bear the sterling mark. It appears to be Alpaca silver, an alloy of three metals which will polish up nicely. What's great about Alpaca is it's not a thin electroplating and won't rust. It was the preferred metal to sterling which tarnishes as soon as you turn your back. The pie crust skirt edging is stainless, again, for the same reasons. It doesn't get as high as shine Alpaca can but a close match. The rawhide braiding on the horn denoted a quality saddle. Often the braiding where the skirts meet at the back was more intricate. This saddle may date back to the 70 or a little earlier, going by the horn work and more modest use of silver.