Here is a stock pin dating from ca. 1920-1950. There are no marks. Such pins were worn on the stock, or tie, of the riding habit. The pin is gold-filled and in the shape of a riding crop with a horseshoe superimposed upon it. In the center of the horseshoe is a glass cabochon with a sleek horse's head inside. This pin is in excellent original condition. It measures 2" long X 3/4" wide X 1/4" thick. It has a safety catch.