Schloss 250 Puzzle

A sequential wooden lock puzzle that needs no key to open. Move four sliders horizontally in the correct order to solve, the challenge is you'll need at least 250 moves to complete the Castle (Schloss) 250 Lock. 

Handmade by Jean Claude Constantin and made in Nuremburg, Germany using laser cut wood. Constantin is a prolific puzzle designer known worldwide, this is just one puzzle from his extensive range.