Red Bakelite circus dog juggling 2 brass balls while standing on wood barrel. The pin measures 3 1/4" X 2 1/8" and has a 2 part inset safety clasp. This little guy has had cosmetic surgery on his ears and has been professionally restored by evening them out. You wouldn't know if I didn't mention it.
A similar pin can be seen in The Bakelite Collections Dogs section on pg. 181.