The name of the puzzle comes from the need to find the Lincoln coin inside. A Palladium coin is a form of currency minted from the precious metal palladium. Unfortunately, the front coin is not made from that precious metal but is 24k gold plated. There are about 5 steps to complete the solve. This is not a very difficult puzzle once you understand the mechanisms. But getting to know the mechanisms is the difficult part.

The puzzle acts like a fidget spinner. The inside is free from the shell. If you don’t want it as a puzzle, it’s a pretty cool fidget. Haha