Calibron 12

The Calibron 12 puzzle was designed in 1933 by the son of Thomas Edison, Theodore Edison.

The aim being to fit the 12 pieces into the opening. There is only one solution and this puzzle is rated a level 10 being extremely difficult.

A fun puzzle to play around with as you always seem to get quite close!

This version comes with a wooden cover on top and the pieces are made from at least four different kinds of wood.

The puzzle comes unsolved by the solution is included.

We aim to ship all orders within 24 hours (Mon-Fri) and you can choose from a range of options during checkout.

Delivery within the UK should take 24-48 hours from dispatch (excluding weekends).

International orders may be subject to import charges. For more information and international shipping details please see here.

Returns

If for any reason you change your mind you can return your items for a full refund within 30 days as long as they are in the same condition they were received.