There must be a lesson in here somewhere that the Vibration on the reverse chewed up the rim on the same area of the obverse.
If it were an out-of-collar strike, it might be conceivable that the vibrations of the die (or machinery) could affect the opposite side, but that doesn't appear to be the case. Chris
The opposite side has to be involved in all cases, something has to resist the motion of the other thing or there would be no impression on the coin - even in a normal strike. I think the edge of the die on the obverse cut into and shaved off a bit of the rim (or field near the rim) because of all that motion on the other side. The image sux, but that stuff looks sharp enough to cut.
It looks like the planchet may have got stuck in the retaining collar and then forced down by the dies. this would have pushed some of the rim over to where the die could strike it. IMO it's too minor to be worth a premium over face value.
