I think the OP's 'full indent' is the term they mean to use for 'Uniface' strike.
Yes, it's known as a 'rim cud' Nice find, larger than average rim cud.
....a stained pareidolia, at that !
Not an error coin Man-made damage
Lamination - improper metal mixture
Stained - not an error coin.
As noted above, it's a lamination on the planchet (due to improper metal mixture) that detached after the coin was struck, and in circulation....
Agree with all the above comments - It's glue residue - would come off with acetone.
That 79-D Cluster above was in the group I bought - one of the better ones!
I don't recall the exact number of bonded planchets, but it was about two dozen planchets.
That 'Funnel' of Cent Planchets was mine, and I sold it to Charmy about 10 years ago. It was something that we used to speculate at the local...
It can be done by counting the 'rings' even in very closely overlapped strikes. There are a few 2000 Sac Dollars with over a dozen strikes, most...
Actually, I bought it intact from the dealer who bought the group from the Sale, here in Southern Calif.
I'd say Die Deterioration - worn/overused die. See all the Die scratches on the obv. -
I see the discoloration in that far left 'window' - kinda looks like a shadow of a person - known as Pareidolia "Man In the Window' - a great...
In the field, to the right at 9:00 ? That's damage/circulation scuff, not a die chip
Die Crack - nice you spotted it....
Yes, I'd call it a minor Mis-Aligned Die (is the reeded edge normal?)
Nice Quad Struck Cent (not a cloverleaf) At $2,300, it's about three times what it's worth, imo.
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