Double strike coins 1 1

[Jgirl]

Do Double strike coins increase the value of a coin? It is a mint error if so how much does it increase the value?

[KaileeS CS]

Hello @Jgirl, thank you for contacting us. Hope you are doing well! NGC is a coin-grading company. We do not buy, sell, or value coins. You can find out more about our company online at About NGC | NGC Coin Grading | NGC. You may want to consider taking the coin to a currency dealer to see if they can help appraise the coin for you. A list of NGC-Authorized dealers can be found here: Dealer Locator | NGC.
 
If you are interested in submitting coin to us for grading, you can find out more about the process at How to Submit | NGC (ngccoin.com) and our grading fees at NGC Services and Fees | NGC (ngccoin.com).
 
If you have any other questions, please let us know. Thank You!

[Sandon]

   You should post questions like this in the "Newbie Coin Collecting Questions" forum, as the NGC staff does not provide such information. If you are asking in regard to a specific coin, please provide clear, cropped photos of both sides of the coin.

   I'm unclear whether you are asking about a coin that was struck twice, which is classified as a mint error, or a coin struck from a doubled die, which is classified as a die variety. For the former, see the examples of "double, triple, and multi-struck coins" at Learn Grading: What Is a Mint Error? — Part 2 | NGC (ngccoin.com).  For the latter, see Double Dies vs. Machine Doubling | NGC (ngccoin.com).  Both types of coins, if genuine, have collector value that depends on a number of factors. Regarding the latter, there are forms of "doubling" on coins that do not result from doubled dies and generally have no value, one of which is the machine (a.k.a. strike or mechanical) doubling referred to in the second link.