found this coin in a whole bunch of silver quarters my grandma gave me. I've mistaken pmd with errors before so i'd like other opinions. 1963 quarter http://i749.photobucket.com/albums/xx131/jon4485/Coin errors/CIMG1289.jpg
An RPM would not be sheared off like that. That looks like machine damage. Note the shelf-like shearing of the mintmark. The dies came together to strike up the coin. As the hammer die was going up immediately after the strike the die chattered causing the die to shear off a portion of the just-struck mintmark.
ahh is that what is going on in this one too? http://i749.photobucket.com/albums/xx131/jon4485/Coin%20errors/1941-S.jpg i think i get what your saying and that if it were to be an rpm they would probably be a bit more spread out and probably at the same elevation, plz correct me if i'm wrong.
Well, I don't think he is suggesting the secondary image would be the same "elevation" as much as both images of the mintmark would look basically the same, having the typical rounded look of a regularly struck mintmark... In machine doubling on the other hand, the secondary image has a very flat face (shelf-like appearance) where the die literally slides to one side slightly immediately following the strike... Also, the primary image is often thinner in the doubled area than it would normally be... The round portion of your 'd', for example is thinner than the standard 'd' mintmark would be... Hope that helps...
