IPP wooden Burr 14 piece by Brian Young – New2Play
Brian's Damn Puzzle Blog: 2012 New York Puzzle Party (Part 6)
LOT of 4 IPP Puzzles plus one
Quintet in F (Exchange Puzzle IPP 31)
Solving the Mystery of the Secret International Puzzle Party - Atlas Obscura
Puzzle Auction - IPP Puzzles
High Difficulty Puzzles Bitten Biscuits international Puzzle - Etsy
Puzzle Auction - IPP Puzzles
2016 Design Competition Results
Plus! Puzzle! Burr Puzzle Edi Nagata IPP 30 Exchange Puzzle 🧩 | eBay
IPP Martian Diamond | George Sicherman | Mr Puzzle
5 IPP Puzzles plus one more Lot 8
Circelei IPP26 Exchange Puzzle by Henrik Haak
5 IPP Puzzles Packing and Poly shapes Lot 2
IPP21 Burr, Exchange Puzzle from Mr. Puzzle, Brian Young
LOT of 4 IPP Puzzles plus one
IPP anti Slide puzzle | Very unusual goal | Mr Puzzle
Andreas Röver - Puzzles
IPP Martian Diamond | George Sicherman | Mr Puzzle
IPP 29 Puzzle Lot - Revised
PuzzleMad: The IPP was a great success!
The Pentagon Tiles. IPP 32 Packing Puzzle by Marcel Gillen Design by René Dawir | eBay
Very difficult 3 piece packing puzzle | IPP | Mr Puzzle
5 IPP Exchange Puzzle, 2000-2002
Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP33 Exchange Puzzles
8 x IPP 39 exchange puzzles
