It's a Pirate Signal (the Frog)! Every September the world celebrates Talk Like a Pirate Day, and here the Jolly Roger gets a Geocaching makeover with Signal the Frog (the geocaching mascot) sporting a pirate eye patch. The design is etched right into the wood, and the back is a smooth blank surface.
Please note that there are some variations in the wood colouring, so the shade of the nickel you get may differ slightly from the pictures.