Two Cats and Two Mice c. 1920s German Dexterity Game

My local flea market just opened for the season, making me happy, and providing the opportunity to dig around for little treasures this charming dexterity game. It's a fairly rare and collectible one, German, c. 1920s, with the two silver-toned mice not too difficult to ease into their cages (either nose or tail foreword), to protect them from the cats! 

2 1/4" in diameter x 3/8" deep. Some wear/light rusting to the metal exterior but overall very good condition and works perfectly.