*** Edited by Staff to Add Year / Mintmark / Denomination to Title. It's very important to have in the title. ***I was going through a bunch of quarters I had saved up over the years and ran into these 3 quarters. They are 3 different years (1990,2004,2016) and all minted in Philadelphia. The same brown thing is on all 3 front and back and they are smooth to the touch. They feel almost like they are coated in wax. Is this something that happens in error, or did someone paint them? Is something like this worth anything? Thank you for your help!
