Vintage made in Japan straight pin back. Approximately 1-1/2 inches in diameter. Possibly from the 50s? Printed in red and black. Graphic: Shows a man driving by a billboard with his eyes bulging out and his hair standing on end. He is reacting to the words on the billboard - the man is printed in black. Text: 8 Gals for $1.00 on the billboard - printed in red. The joke: A double entendre using a billboard advertising inexpensive gasoline - the meaning being taken out of context from the abbreviation of gasoline to Gals. There is a red ring around the edges and made in Japan printed at the bottom.