Solution uses the Gray binary system, as well as the Chinese Puzzle Rings and the Tower of Creation
A 'Monster' 5-tiered, 9-pc version of crystal-clear plastic, made by Kadon Enterprises, can be seen on my E-Bay page .
Plato's Plight (1971)
Their newer version is now known as Plato's Secret .
Other manufacturers' names include :
Reiss Games' Cobweb .
Skor-Mor's Merlin's Stone
Futuristic Products' Philosophers Knot
My version - on My Creations page - is called Whiting's Woe , and is approximately 5 times larger .
The solution to this puzzle can be viewed here
Although they are still selling puzzles, this one has been discontinued .
Reiss Games' The Star .
Also known as Mystic Star by Tresco Plastics Ltd. of England from the 60s .
On The Level
Each of the nine sculpture-like playing pieces is different. Each has three elevations. They have to be arranged on the playing grid so that all edges match in elevation .
Size: 4 1/8"x4 1/8"x2 9/16".