Product was successfully added to your shopping cart.


  • CHALLENGE: Open the secret box

  • Difficulty: EXPERT 6/6

  • This is a binary puzzle with seven locks, which means that 128 steps are necessary to solve it

  • Dimensions: 15,5 x 15,5 x 8,5 cm / 6,1 x 6,1 x 3,3 inches

  • Made in Germany by Jean-Claude Constantin

Availability: In stock

Available 9 pieces



This item is shipped from Italy, Turin.

You can select shipping options at the checkout.


PRICE (?) For exact shhiping cost add products in a cart and go to VIEW CART to estimate shipping



UK, Europe EU Zone 1 (?) Austria, Belgium, Croatia, Denmark, Finland, France, Germany, Ireland, Luxembourg, Monaco, Netherlands, Portugal, UK, Spain, Sweden € 8,90 € 99,00 1-3 days
Europe EU Zone 2 (?) Andorra, Bulgary, Czech Republic, Estonia, Gibraltar, Greece, Hungary, Latvia, Lithuania, Liechtenstein, Poland, Slovenia, Slovakia, Romania € 9,90 € 99,00 1-4 days
USA, Canada, Europe Extra EU (?) Norway, Switzerland, Canary Islands, Balearic Islands, Corsica, USA, Canada € 19,90 € 150,00 1-4 days
Australia, Mexico, Rest of the World (?) For exact shhiping cost add products in a cart and go to VIEW CART to estimate shipping € 35,00 € 200,00 3-7 days
Italy € 5,90 € 69,00 1-2 days

* Minimum order amount for free shipping



to view the solutions


One of the most beautiful sequential puzzle boxes made of wood, designed for puzzle experts!

CHALLENGE: open the secret box. Move the pieces to let the wheel in the middle move freely; will you be able to discover the box lock?

In the beginning, all the dark tabs are down, and only one piece can be moved. The solution of the puzzle seems unclear, as no piece looks to be able to get out. But once one or two moves are performed, it becomes clear that the mechanism is sequential and the solution very long and you may loose the idea many times... Good luck!
This is a binary puzzle with seven locks. Which means that 128 steps are necessary to solve it.

Difficulty: EXPERT 6/6

Estimated solving time:

  • Beginner puzzlist: 3 years
  • Casual puzzlist: 1 year
  • Expert puzzlist: 1 hour - 1 day

Dimensions: 15,5 x 15,5 x 8,5 cm / 6.1 x 6.1 x 3.3 inches.

Inner space: 11,2 x 11,2 x 5 cm / 4.4 x 4.4 x 2 cm (take a note of inside pole exactly in the center in the inside space)

Woods: Padouk, Maple Deco

Handmade in Germany by Jean-Claude Constantin.

Jean-Claude Constantin lives in Germany, where he designs and manufactures many different laser-cut wood puzzles, as well as metal puzzles and magic tricks.


Additional Information

SKU 5888955442
Price €119.00
Difficult Expert
Dimensions Big
Age 14+
Pieces quantity 1-4
Brand Constantin
Color No

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

  1. Be the first to review this product

Write Your Own Review

Only registered users can write reviews. Please, log in or register

Creazione Siti Internet Torino

Tux Web Design realizza siti internet e posizionamento a Torino e provincia.