1927P Buffalo

[Shleppodella1]

There's a delam starting on the obverse of this 1927P thru the ponytail and the reverse looks like LDS on the device an inscription with a touch of PMD on the rump but is that what caused the cud or bar above USOA by rim?

[occnumis2021]

likely the culprit is the same that caused the other lamination type error, improper metal mixture or bubbles or something. impurities even, like slag?

there is a term for some extra metal that forms around the edge/rims of coins but it ain't coming to me just now. almost certainly will be on error-ref as this is not a rare occurrence on buffs or other denoms.

[Shleppodella1]

I'm going to look it up but are you referring to BAR designation that forms between the inscription and rim?