"Paint-by-numbers" kits were invented by artist Dan Robbins and engineer Max S. Klein in 1950, and quickly became a popular American hobby. The unpainted boards were outlined into several sections, each numbered with a corresponding color of paint included in the kit. An amateur painter simply filled each section according to the instructions, and voila! -- a beautiful work of art.
These vintage equestrian portraits are two such paintings, most likely included together in a single kit. Each has been mounted in an oak frame and wired for hanging by their proud creator, and after the better part of a century, they're ready to be passed on and admired by a new owner.