Group the four colours to solve. Alternative names: "Doublering" or "Zweiring"

• Inventor: Endre Pap
• Mechanism: Intersecting rings (Hungarian Rings)
• Patents: Unknown
• Producer: Unknown
• Year: 1982
• Original Price: $18.00 USD
• Current Price: $17.89 USD

Maybe the most often produced version of this puzzle.
Size: 135 x 90 mm
Weight: 40 grams

For image 5:
Courtesy, The Lilly Library, Indiana University, Bloomington, Indiana

Price Tracking Data

DISCLAIMER: The following table contains user-generated content. This information is collected to serve as a rough guideline and is certainly not complete and may not even be accurate. This information is filtered and carefully moderated, but incorrect information will inevitably find its way into the system. Always use your own judgement when buying or selling an item.

	Sale Date	Price (USD)	Sale Type	Condition	Package Condition	Notes	Contributors	Edit
	Aug 21 2004	$5.55	eBay Auction	Excellent	Excellent	None	Nicky
	Aug 31 2009	$1.96	Private Sale	Poor	Missing	None	flockyknocknahillifipocation
	Jan 1 2010	$56.86	Unknown	Unknown	Unknown	None	Unknown
	Aug 18 2010	$12.99	Other	Excellent	Sealed	None	Phoenix
	May 21 2013	$15.00	eBay Auction	Mint	Mint	None	Unknown
	May 21 2013	$15.00	eBay Auction	Mint	Mint	None	Unknown
= The sum of all currently check-marked rows.
= The average of all currently check-marked rows.

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

This puzzle can be found in collections of these members:

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