I trying to learn names and how to recognized errors for now I sucks . I think this is cud on pennies
yea those are die chips.. the liberty one is known as a BIE, more info on that one here http://cuds-on-coins.com/lincoln-cent-bies/
That same site may have info on the die break on the T in CENT. That one might be here: http://cuds-on-coins.com/interior-die-breaks-on-u-s-coins/