A 60 mm knock-off with reflective paint on the chain links.

• Inventor: Steven P. Hanson and Jeffrey D. Breslow
• Mechanism: Missing Link
• Patents: US4373729
• Producer: Taiwan
• Year: 1982
• Original Price: $2.98 USD
• Current Price: No Data

A knock-offed version produced no later than 1982 because these were mentioned in David Singmasters Cubic Circular Issues 2 from Spring 1982.
Images 5-6 show an alternative version named "Link Puzzle". The type of key chain is different but the puzzle and the size are identical.
Size: 16 x 16 x 64 mm

Thank you to the following people for their assistance in helping collect the information on this page: Sandy, rubikfreak.

This puzzle can be found in collections of these members:

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