Ltrain & Abe. I am sorry for not giving this coin a better examination. You are obsolutly correct in stating that it appears to be a filled hole. I guess my eyes are catching up to my age.
It happens. don't sweat it. Never saw a filled Merc before, haha. I've seen holed, but filling a common date merc? Eh...
OK, my comments about it being the result of heat and an expanding internal gas bubble was based on his statement that the obv showed "No idications of a punch mark." Now that the obv has been pictured I can say I was wrong. The "bubble" on the back is simply the result of a dent caused by the obv having been punched. It has not been holed and filled.
Thank U Abe:thumb: as a Dime collector I seen a few Mercury in 50+ year of collecting that one of the 1st thing I look for on Mercury Dime a lot were made in to pendants
That coin was not holed and then filled. You can clearly see the dent to the left of the R. The bubble is just the displaced metal. And of course I was joking about drilling a hole to let the air out....