Posted 08/07/2010 8:18 pm
It is not doubling as in hub doubling. It is a form of Machine Doubling. I think the mark on the 4 on the left edge of the cross bar is common. I check a few from this year and the first one had it. The other two I checked it wasn't there, but they were later die state coins. So they may be present on earlier die state coins. Something to watch for on the early 60's cents is the bar under the L on LIBERTY. On one I found a bar above the 4. So it appears that the hubbing rotated sightly and made the marks on the opposite sides of the outer devices.
