Selling my The Organ sequential discovery puzzle by Benno de Grote.This is a great and pretty challenging SD puzzle. Info from Benno's site:"The Organ is a difficult sequential discovery puzzle box, designed to challenge even seasoned puzzlers. It has an average solve time of 1.5 to 2 hours. This compact puzzle measures 128 x 130 x 66 mm and weighs 440 grams, giving it a substantial, premium feel. The objective is to find the hidden music key, and the puzzle is designed to keep solvers engaged ...
€130.00