How much is a 1968 penny with no letter worth?

A 1968 penny without a mint mark, produced in Philadelphia, is generally worth only its face value of one cent. However, if it is in uncirculated condition or has any unique errors, it could be worth a bit more to collectors, potentially ranging from a few cents to a couple of dollars. For a precise valuation, it's best to consult a coin expert or a pricing guide.