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Minnesota State Quarter Extra Tree ErrorWhile Minnesota is known as the "Land of 10,000 Lakes," its State Quarter may be on its way to becoming the "Quarter With 10,000 Varieties!" So far, there are at least 54 different reverse variety types noted for the Philadelphia Mint's issue of the 2005 Minnesota State Quarter! In addition, at least 6 different reverse types have been found for the Denver coins, and 4 types for the San Francisco Proof coins, as collectors broaden their search for these profitable varieties. Specimens of the strongest examples of these Minnesota Extra Tree Quarters have sold in the $100 to $200 range, with a slabbed Denver MS-67 example bringing nearly $800 on eBay recently!

As if all of these reverse varieties aren't enough, an obverse "doubled ear" variety has recently been reported from the Philadelphia Mint, according to error and variety coin specialist Ken Potter. Ken lists all of the known Minnesota State Quarter varieties, including his awesome close-up photos of each type, on his Web page devoted to the Minnesota Quarter. Before checking out the exhaustive list, however, take a moment to read the article he wrote regarding the discovery of this type and what kind of variety type we have with the Minnesota Extra Tree Quarters.

Photo courtesy of Ken Potter - NLG.


April 9, 2007 at 9:29 pm
(1) keith says:

i have a minnesota quarter, it is a error coin, a part of the copper shows through the silver by washington’s brow to the edge…..just curious what its worth

April 11, 2007 at 6:18 pm
(2) Susan Headley says:


Without seeing a photo of your coin, it is impossible to speculate as to what the cause of the copper showing through might have been, and therefore what the value might be. Can you please scan your coin, or get photos of it, and send them to me at coins.guide@about.com?

Thank you,
Susan Headley
About.com Guide to Coins

November 27, 2008 at 6:51 pm
(3) Jared says:

hey I have a sliver dime I forget what year I think 1945 and a sliver 50 cent piece what are toose worth they’re in fairy good conditon and the 50 cent one is about a 50 on the scale of 1-70

November 22, 2010 at 12:27 pm
(4) Diana says:

I have a quarter that is silver and is thicker than a regular quarter. It is lighter and almost looks fake. Is it worth anything?

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