That's on cardboard isn`t it ?? The right is the litho company that printed it and the number is probably the series number and is important only to the litho company that made it !! Do you see the curvy texture in the pics,, that's how all of these cardboard things were done,, may be a different shape but they all have an overall pattern !! They have changed in since then but you can find lots of these at garage sales !!