It should come as no surprise that buying a puzzle masters collection will also come with some of their prototypes... I have so many prototypes now. Many are like this one... finished and raw without stain, some with writing on them, and others in various iterations.
Thisois the first prototype I am selling from Bill Darrahs collection. This is a beautiful cube that is part stacking and part interlocking. I can hold this one up and it won't immediately fall apart. Thankfully.
Shipping determined at close of auction.