Stewart Coffin's Involute by Mark McCallum

This is a 20 piece altekruse type puzzle of unknown designer. J. McFarland modified it with extra internal notches to allow a 6 piece burr to fit inside. The puzzle uses 1" sticks and the 6 piece burr is a level 5 Bill's Baffling Burr designed by Bill Cutler. Both puzzles were made in 1988, only 2 sets made. 8 pieces need rounded edges in the notch for the puzzle to assemble.

"Despite the devilish difficulty of this puzzle, let me assure you that Derek is a really nice guy. Keep that in mind as you go crazy trying to solve his latest creation. Derek's half dozen is fiendishly difficult at a level 26.9.5 solution. It's so hard to solve I took pity and made the pieces from three woods so you'd have a big clue as to what goes where. I'm also shipping it assembled. You're welcome.Construction is dead on with VERY nice tolerances. Everything's square and beveled, with thr...

Stewart Coffin's Improved Cluster Buster by Scott Peterson - inscribed #3-6/11-STP.

A three piece 3x3x3 "cross" burr. Includes stand.If the buyer chooses to be invoiced through Paypal, then Paypal fees of 3.98% will be added to the price. Buyer assumes all shipping fees.

Purpleheart and Pao Amerillo If the buyer chooses to be invoiced through Paypal, then Paypal fees of 3.98% will be added to the price. Buyer assumes all shipping fees.

90 pieces. Made of MahoganyIf the buyer chooses to be invoiced through Paypal, then Paypal fees of 3.98% will be added to the price. Buyer assumes all shipping fees.

6 pieces Walnut & OakIf the buyer chooses to be invoiced through Paypal, then Paypal fees of 3.98% will be added to the price. Buyer assumes all shipping fees.

The Sears Tower was a souvenir puzzle for IPP23 Chicago, 2003. 13 wood pieces.

This burr is newly made from left over parts, recently lacquered, waxed and buffed. GigaBurr was a souvenir for IPP19. For more details see attached instructions.

A souvenir of IPP21. A three piece level 6 burr. This burr is newly made from left over parts, recently lacquered, waxed and buffed. See attached sheet for details.

A level 6 three piece burr made of Walnut, Cherry and Wenge. This burr is newly made from left over parts, recently lacquered, waxed and buffed. For more details see instruction sheet.

Puzzle made of Bloodwood, Bocote? and a light unknown wood.

from cubicdissection.com:Tom is well known for his cube puzzles with tricky rotations. His latest is a three piece assembly with a very reasonable level 6.6 solution that's a lot of fun to solve. The exterior spaces and contrasting woods give it a nice apearance as well!I've constructed this from solid exotic woods. Each individual building block is beveled on all edges, and the butt joints were clamped for extra strength.32 total copies made for sale, each signed and dated. Ships assembled.

Set of four Constrained Burrs by Logan Kleinwaks, made by Eric Fuller. His comments on the original listing:- When Logan sent me the first puzzle in this series, the Bookend puzzle, I was very impressed. The concept was interesting, the solution tricky, and of course the finished puzzle displayed very nicely. He then followed it up with three more complimentary designs, each with a unique solution. I knew immediately I wanted to make them, and so now I'm very glad to be able to share with you...

A unique puzzle that separates into 4 pieces, each composed of "planks" that are 1 unit by 4 units in size, and where the pieces are attached at 90 degree angles. Made in four different woods by Jean-Claude Constantin, who lives in Germany and designs/manufactures many different puzzles using different materials (wood, metal, etc.). Puzzle has a modern sculptural look that displays well in any collection. There's some slight bending of certain planks, but no significant effect on the o...

RELEASED:11.29.2012PRODUCED:40 CopiesDESIGNER:Gregory BenedettiCRAFTSMAN:Eric FullerMATERIAL:Sapele / WengeCOMMENTS:This is the companion puzzle to the much easier "Two Halved Cage 3b". The last one gave an idea of the concept; this one kicks it up several notches!This non-millable six piece burr is surrounded by a cage split into two mirrored halves. Not only must the solver figure out the burr itself, but they must also understand the burr within the constrains of the cage. That alone would be...

RELEASED:5.30.2012PRODUCED:40 CopiesDESIGNER:Jeff NamkungCRAFTSMAN:Eric FullerMATERIAL:Canarywood / Cocobolo - Sapele / EbonyCOMMENTS:This is one of those puzzle designs I almost passed up. A couple customers emailed me, asking if I Would make it. Looked like a normal 4x4 cube to me so I was fairly non-committal. Then several more customers chimed in over the next couple weeks, and I gave it a more serious look. While indeed a simple 4x4 cube (no rotations even!), this design steps up the diffic...

RELEASED:5.27.2013PRODUCED:42 CopiesDESIGNER:Stewart CoffinCRAFTSMAN:Eric FullerMATERIAL:Cocobolo or Ebony, Spalted Wormy Holly or Canarywood, Sapele, AcrylicCOMMENTS:I was browsing through AP-ART when my eye fell on Mr. Coffins design #187 family. I have not made a cool tray puzzle in a while, and this seemed like just the ticket. I also had a nice bunch of ebony and cocobolo that would be perfect for it!.About design #187, Stewart says:"The three puzzles in this category all have a 5×5 square...

This is a one-off puzzle I made for myself. Very small, yet very precise. It's quite difficult to make accurate puzzles at this scale. Involute is the second iteration of the famous Convolution puzzle. Very tricky and fun to solve.This is a very nice, one of a kind puzzle.This item is from my personal collection. Shipping is $8 in the US for Priority Mail. International shipping is $18 for first class and $35 for Priority Mail. I will combine shipping for multiple items. The last picture is...