Jokes? This dude probably made 100,000$ with this simple trick and you are worried about a 50 cent penny!! Just kidding even more!!!!!!!!!!
Wish you doubters could be here right now to see MY toothpick "trick" with the dirty 1874-CC MS-62 Trade dollar I'm playing with.
Ragged edges...does it have to be grease it was struck through or could it have been a chip of metal debris? Just asking.
It doesn't have to be 100% compacted grease, and that is where I think some people are missing the boat. The grease can mix with particles of dust and other debris and become very hard from continuous strikes. Take a look at the obverse of my Kennedy which is missing the reverse clad layer. You will notice that grease was mixed with small bits of debris around the perimeter. Chris
It almost looks a little bit like this one, depression or recessed into the coin. But the edges are not as jagged.
That is getting in the vicinity, but there are no edges as you noted. That one I could easily believe would be dropped grease.
Go ahead and call me a liar because I said that I've seen hundreds similar to the OP's. Just because you haven't seen one doesn't mean you're right. It only means you have no imagination. Chris