1983 late stage capped die struck cent. A capped die strike is caused by a struck coin sticking fast to the hammer die and striking another or many more coins. The more coins the capped die strikes the thinner it becomes and the more details apparent on the obverse of the cap struck coin.
This example, most lettering, date and bust are discernible but weak. The date is unquestionably 1983 with no mintmark from Philly. Mostly Red.