Oh that? I've got a couple of rolls of those :P
The 68 is just dirty. The 88 is what's known as a grease filled die. Basically, some gunk got in the die when the coins were minted. If you look...
In my defense, I've had a few beers tonight. Nothing like being on leave, drinking some beers, and looking at coins :)
VERY slight. I completely missed it. :)
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