Vintage straight pin back novelty button made in Japan. Possibly from the 50s?
Approximately 1-2/2 inches in diameter. Black and red on white.
Text: Don't monkey with me- printed in black.
Graphic: Picture of a monkey sitting on the ground with both hands on his head printed in black.
Joke: Don't mess with me.
There is a red ring around the edges with made in Japan printed at the bottom.