I have found a few of these as well... they seem relatively common but I also set them aside. Out of about 25 new rolls of the mixed coloured and non-coloured, I found 9 like that (the 19 version). All on the non-coloured ones.
I went through my dimes and it does seem like a common error. It is pretty cool though and makes it fun to collect.
Overall this coin has outstanding art work. Whenever I look at it in hand the waves always seems to reflect a slight blue tone on certain angles. I wish they kept this design going forward.
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Coin Community assumes no liability for errors. Copyright 2005 - 2022 Coin Community Family- all rights reserved worldwide. Use of any images or content on this website without prior written permission of Coin Community or the original lender is strictly prohibited. Contact Us | Advertise Here | Privacy Policy / Terms of Use