This US Mint Customizes Challenge Coins For Corporate Clients & Trade Events

<p>You can now commission a run of custom challenge coins from Gray Water Ops, complete with their patented NFC chip integration technology. </p><p>To read more about the tech that powers these coins, visit <a href="https://www.graywaterops.com/nfcchallengecoins" rel="noopener noreferrer" target="_blank">https://www.graywaterops.com/nfcchallengecoins</a></p><p><br></p> Gray Water Ops, LLC 5825 Tyler Dr, Harrisburg, PA 17112, United States Website https://GrayWaterOps.com Phone +1-717-412-1402 Email Keith@GrayWaterOps.com