The 1913 Barber Half Dollar is a highly scarce coin that serves as a semi key for its series. Click image to enlarge. The Barber Half Dollar has long been recognized by collectors as a deceivingly difficult series to complete, even in a setting where every coin must grade “only” G4. Unless you’re familiar with the nuances and history of the Barber Half Dollar, it may seem strange that completing a set of these coins in, say, G4 or VG8 is so tough.