i discovery puzzle is by Dee Dixon, and whilst this is a prototype it is late stage and the solve is identical to the final version, except for one very small initial step that does not affect the sold in any way. The woods used are absolutely beautiful and although I hate to sell this needs must, unfortunately.
Probably the Bits and Pieces version rather than the En-Deavour (which were a limited run made by Rocky).Mechanism works well. Very tricky.Shipping is $6 UK and $18 elsewhere.