Filters
Model #808 - John Partridge
Burr-Muda - Stewart Coffin
Quad Puzzle (improved) - Stewart Coffin
Stickman No. 9 Snowflake - Robert Yarger
Model #055 - John Partridge
Recube - Viktor Genel
Pearl Vault Puzzle - Bruce Patterson
Model #357 - John Partridge
Model #360 - John Partridge