Refs: MCM,Fivecents,Julio,Robman,Endzone,Coiny,Agentjim007,Musky1011,holeinone1972,Tdec1000,Type2,bumanchu, Metalsman,Wondercoin,Pitboss,Tomohawk,carew4me,segoja,thebigeng,jlc_coin,mbogoman,sportsmod,dragon,tychojoe,Schmitz7,claychaser, Bullsitter, robeck, Nickpatton, jwitten, and many OTHERS
That is a stain... if acidic, it will not come off...Acetone will remove organics... either way, it does not add numismatic value... even for those who collect tarnished coins. Cheers, RickO
Comments
Looks like dried soap scum or tape residue or ....
First, see if it comes off. Q-tip with acetone and roll.
Acid treatment. Someone playing with chemicals.
Environmental damage
That cent will improve if you place it on the asphalt in a Wawa parking lot for a few days. Peace Roy
BST: endeavor1967, synchr, kliao, Outhaul, Donttellthewife, U1Chicago, ajaan, mCarney1173, SurfinHi, MWallace, Sandman70gt, mustanggt, Pittstate03, Lazybones, Walkerguy21D, coinandcurrency242 , thebigeng, Collectorcoins, JimTyler, USMarine6, Elkevvo, Coll3ctor, Yorkshireman, CUKevin, ranshdow, CoinHunter4, bennybravo, Centsearcher, braddick, Windycity, ZoidMeister, mirabela, JJM, RichURich, Bullsitter, jmski52, LukeMarshall, coinsarefun, MichaelDixon, NickPatton, ProfLiz, Twobitcollector,Jesbroken oih82w8, DCW
That is a stain... if acidic, it will not come off...Acetone will remove organics... either way, it does not add numismatic value... even for those who collect tarnished coins. Cheers, RickO