I wonder. Is the Grabowski signature that appears on my ball a replication, too?
None of the fountain pen "structure" appears on the replica balls--the double lines produced by the split nib, the places where one line crosses another, etc. All of this is easily visible on my ball because the pen was relatively dry--it did not have a strong ink flow. There are pen impressions, as well. There is no doubt the ball was signed.
i posted large close-ups of this ball--and other autographs--here years ago. I will NOT be doing so again.