Hi Roger!
I received these 2 coins at the PO today. I'll be able to photograph and examine them sometime after the weekend.
I haven't had any time to study the pair, but a cursory glance confirms that the issue was certainly on or stuck on the Die.
These 2 may prompt more questions than you began with. (How do you classify or find an enthusiast of a "progressive" struck-thru?)(is that even a numismatic term?)
I'm not saying for certain that I know what it is yet- But I know it's unusual, and probably rather scarce.
Be honest- If you weren't looking for the 2006 Doubled ear, you wouldn't have ever discovered this, would you have? I know I wouldn't. Some pickers spend hours on a handful of coins, closely examining obverse, reverse then the third side. I know you to be a different type- you look for the varieties that are actually in demand. And in the course of doing so, you lucked out in noticing something you'd have never seen if it were on the obverse of a 2009 cent, right?!
These are 2 cool coins. I'll be updating this thread when I am able to give these coins the attention they deserve.
Thank you for your trust and respect, I hope to show you it was well earned. -Chris