Engelberg Square Variation was Nick Baxters exchange puzzle at IPP 19 in London, 1999.Nick modified the original design by Stewart Coffin to add some torture.The solution is very tight, this was verified at 60% humidity so it may improve in a better environment.The puzzle can be shipped in the solved state if requested.

Surface was Jean Claude Constantins exchange puzzle at IPP 19 in London, 1999.25 cubes (2x2x2 cm) of 5 different woods, together with  8 aluminium bars (1x1x14 cm), make up a square surface.To complicate things a bit, 24 of the wooden cubes are attached to the aluminium bars. 1 cube is loose.Take apart the square, mix up the parts, and reassemble the square.This puzzle is still in its original shrink wrap.

Drumsticks was Allen Rolfs exchange puzzle at IPP 19 in London, 1999.Beat the hidden mechanism to separate the two sticks. This puzzle takes 2 'moves' to open. It is made from very nice and shiny hardwood, although I don't know which wood type it is.It has multiple cavities on the inside, these are part of he mechanism and shall not be used to store any items (i.e. it is not a puzzle box). 

Octo-Burr was Tyler Barretts exchange puzzle at IPP 17 in San Francisco, 1997.This puzzle was designed and made by Stewart Coffin (#110 in his numbering system).The apparently 8 sticks come apart in 5 pieces, i.e. some sticks are glued together.The first piece that comes out has "110 STC 1997"inscribedA soft and light wood type is used, 

Description from cubicdissection :"This design was inspired by the interior of the previous box I made, the Reactor Box. The final interior box was held in place by a couple strong magnets, and felt like a button when pushed. It made me think about the things I could do with an apparently simple box that just had a button to push. I like to take advantage of people's assumptions, and everyone has them when it comes to a button! So I set about thinking up designs... I came up with ...

2 Puzzles from Dick Hess.Ipp 31 exchange puzzles berlin 2011.Winner pays shipping cost and a part of paypal fees (4% paypal fees conversion USD to EUR)Shipping price is just an estimation, it will be recalculate exactly.Before payement, message me at the end of the auction to calculate total exact price.For multiple items, combined shipping is available.

My latest puzzle box, the 51 Pound box, has been about six months in the making. I thought up the design a long time ago, but it took a while to figure out the mechanics involved in implementing the concept. Each puzzle is supplied with one pound - the other 50 you must provide yourself!Painstakingly handcrafted from the finest materials, the box features some very nice inlay and intersting stepped miter joinery on the edges of the shell box. Custom internal mechanisms were hand milled from soli...

Put the two pieces flat on the table so that the resulting shape can be bisected into two identical shapes.  Note, this does not have the IPP engraving.  Description on the Sloyd website:  https://www.sloyd.fi/spir-rips-p-1770.htmlBuyer to pay Paypal fees, if any.Buyer pays actual shipping by whatever method he/she chooses.

This is a gorgeous wooden puzzle box with 3 internal compartments.The compartments are 35 mm diameter and 8 mm high, and lined with green soft fabric (not carpet;-).The box opens in one coordinated motion move, very smoothly.This is a stunning display piece and symple puzzle, also very suitable for an NPSO.

Cobble Hedge (Pento Hex) was kunio Saeki's exchange puzzle for IPP16 in Luxemburg, 1996.Kunio Saeki was president of Toyo Glass.The puzzle consistsof a cylindrical glass that holds 10 x 5 glass marbles in specific color patterns.A plastic cylinder ensures that all marbles touch the cylindrical part of the glass.The puzzle goal is to  arrange the marbles so that each line of 5 marbles contains 3 marbles of the same color, and no marble touches a marble of the same color in an adjacent line.This ...

'Easy to play with' was Ray Meads exchange puzzle for IPP19 in London, 1999.6 equal pieces assemble into a burr, an 'offset board burr'No specific instructions were included, making finding the final shape part of the challenge.Two copies are vailable, listed separately. They are in equally good condition.

Dated November 2006. Signed. Number 8 in the set. 

Featured in a December 1991 article in Fine Woodworking Magazine. Described in Stewart Coffin's book The Puzzling World of Polyhedral Dissections; here is some of what he says in the directions that came with the puzzle:"Special version - only one made. No half-pieces, so ignore puzzle problems that require half-pieces. The cube has only one solution in which all sides have matched wood and grain symmetry."

Pack pieces completely within the container.Description on the Pelikan website:  https://www.pelikanpuzzles.eu/detail/pincers/Buyer to pay Paypal fees, if any.Buyer pays actual shipping by whatever method he/she chooses.

Objective is to separate the floating red and blue pieces to opposite ends.Packaging is somewhat worn and faded.Buyer to pay Paypal fees, if any.Buyer pays actual shipping by whatever method he/she chooses.

This is an original design puzzle !Exchange puzzle entry from David Litwin at IPP 35.The goal is to open the razor blade and close it again.After the end of the auction the final shipping cost will be calculated.SEPA bank transfer is accepted (EU countries) and free. The PayPal fee will be added to the final price (4%).

Nine Squared - Tom LenschAll nine pieces have identical thickness but each has a different combination of length and width selected from discrete increments within a narrow range. When arranged correctly into the tray they simply drop in and out with no binding. Several incorrect packings seem like they should fit, if only you press down a little... wrong!

3 pieces to take part and put together.After the end of the auction the final shipping cost will be calculated.SEPA bank transfer is accepted (EU countries) and free. The PayPal fee will be added to the final price (4%).

Description from kelly snake facebook :"Granny's Tea Box - The Pinwheel - #4 in a series of 10 designs. Appropriatley enough there is a wheel and a pin and its all hidden inside, other than that I can't tell you too much, hehe... "A "4 moves to open" puzzle box.The puzzle is offer with the original description signed by Kelly Snake and the box is marked and seems to be numbered like you can see on the photo.Winner pays shipping cost and a part of paypal fees (4% paypal fees conversi...

The 3K was Liang Jen Wu's exchange puzzle at IPP 19 in London, 1999.This is a three-piece burr requiring one single coordinate motion to assemble.Does that make it a level 1.0.0 assembly puzzle?There is no paperwork or IPP19 exchange label, just the 3 nicely crafled and very smoothly sliding pieces.