IPP Martian Diamond | George Sicherman | Mr Puzzle
The original B Lock By Boaz Feldman – New2Play
High Difficulty Puzzles Bitten Biscuits international Puzzle - Etsy
Mechanical Puzzles | One Guy in IT
IPP 29 Puzzle Lot - Revised
IPP38 Puzzle Exchange in San Diego, California, USA - 11th Aug 2018
LOT of 4 IPP Puzzles plus one
Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP34 - Edward Hordern Puzzle Exchange
Puzzle Auction - IPP Puzzles
8 x IPP 39 exchange puzzles
CSAIL Annual Meeting 2012 Puzzle (Erik Demaine and Martin Demaine)
Andreas Röver - Puzzles
Neil's Puzzle Building Blog | The journey from puzzler to puzzle creator. | Page 2
IPP21 Burr, Exchange Puzzle from Mr. Puzzle, Brian Young
IPP wooden Burr 14 piece by Brian Young – New2Play
Solving the Mystery of the Secret International Puzzle Party - Atlas Obscura
PuzzleMad: The IPP was a great success!
Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP33 Exchange Puzzles
Puzzle Auction - IPP Puzzles
Andreas Röver - Puzzles
LOT of 4 IPP Puzzles plus one
Very difficult 3 piece packing puzzle | IPP | Mr Puzzle
Circelei IPP26 Exchange Puzzle by Henrik Haak
5 IPP Puzzles plus one more Lot 8
Brian's Damn Puzzle Blog: 2012 New York Puzzle Party (Part 6)
5 IPP Puzzles Packing and Poly shapes Lot 2
