Crescent Optical Illusion Puzzle

How puzzling... Metal: Bronze Diameter: 2.45 in / 62.28 mm  Weight: 48 g / 1.70 oz  6-piece, double-sided crescent optical illusion puzzle Introducing the 6-piece Crescent Optical Illusion Puzzle! The first of its kind, this metal brain twister comes straight from the diabolical mind of Woody Maringer, Shire Post Lab's resident mad metalsmith.  You might be asking yourself, "It's only six pieces...what's so diabolical about that?" Woody asked himself that, too. To further puzzle the puzzle, he shuffled the opposite side's pieces before etching in the design.  Perhaps you've solved one side, but can you figure out the other one? Enjoy the challenge without pulling too much of your hair out, and savor the reward when you figure it out. Or can you? BWA-HA-HA!