Mr. Puzzle SEARious Burr 13 piece burr with secret lock

A note about shipping.  I will ship all over the world.  For U.S. buyers, I am military overseas and will ship via USPS.  All others, I live in Italy and can ship through alternative means that are good for you.  

From the Mr. Puzzle Site:

"Edward Hordern IPP23 Puzzle Exchange – Chicago, USA. August 2003. 200 made.
Presented by Brian Young.  Made by Mr Puzzle Australia. Designed by Brian Young.

This puzzle was Brian’s first step towards a true sequential discovery puzzle. Inspired by Gary Foshee’s lecture about the Safe Gary had made as an IPP host gift for Edward Hordern in 1999 Brian decided then and there these were the types of puzzles he would like to start making more of!

The puzzle is to take the SEARious burr apart. Modelled on Chicago’s tallest building, the Sears Tower, Brian created this 13 piece interlocking burr.

But it’s so much more than just an interlocking burr; incorporating the use of tools supplied as part of the puzzle it’s biggest challenge is to open the secret lock. It will take 13 steps to unlock the complex internal mechanism. The elegant solutions does not involve force, or banging, or hitting against another surface.

Even though it has no gravity pins or magnets Brian still considers it to be a very challenging puzzle. Is 13 your lucky number?

This puzzle was Brian’s first step towards a true sequential discovery puzzle.  Inspired by Gary Foshee’s lecture about the Safe Gary had made as an IPP host gift for Edward Hordern in 1999 Brian decided then and there these were the types of puzzles he would like to start making more of!

Manufactured from Queensland Black Wattle; aka Australian Blackwood this tree is a member of the Acacia family and native only to Australia.

Size: 60mm x 60mm x 137mm tall to the top of its communications towers."