Hi everyone I have a 1970 proof set and was looking at it and the mintmark looks small to me on the penny. And the dime has some weird stuff on it. Can someone tell me if I have a small date and what the crap is on the dime. And if the gunk on the dime is bad and should be cleaned off or if it will make cool toning. Thanks
And her is the pic of the dime gunk.