DIFFICULTY RATING 2
The puzzle is to remove the ring.
The Horseshoe puzzle was included in the boxes of Uncle Sam's Puzzles from 1920 but as early as 1915 boxes of puzzles were being sold in Germany which included this puzzle then called the Ring of the Nibelungs which was shaped from wire. The keyring size is a lot more convenient to carry around in your pocket to have fun with friends than full size horseshoes!
Size: 85mm from end to end of each horseshoe
Note: key not included.