i was roll searching for my WAM's and these were just there. i see it alot on the reverse of quarters. are these struck through grease or something else? advice appreciated
I agree with cmp9ball. I see them all the time missing the "O" in Of. Dunno why it's that letter in particular but yeah...
This may be a struck through grease, but this is actually a common place for a weaker strike (can't recall the exact reason). Keep up the hunt!
I've found several halves struck through grease. Almost always happens on the obverse over "LIBERTY" and the date.