PCGS 1979 Washington quarter double-denomination struck on a Jefferson nickel. The coin shows the Jefferson nickel design as a flipover double-denomination (nickel's obverse is on the quarter's...

PCGS 1981-P Washington quarter double-denomination, struck over a 1981 Jefferson nickel. The coin has the designs of a quarter and a nickel on it, with traces of the nickel design visible (especially...

PCGS 1966 Washington quarter struck on clad dime planchet. The quarter is struck on the much smaller dime planchet, with much of the outer lettering missing, portions of the design, and weighing only...

PCGS 1966 Washington quarter off-metal struck on a clad dime planchet. The coin is struck on the planchet intended for striking into a Roosevelt dime. MS64 

ANACS 1977 Washington quarter struck on a nickel planchet. The wrong planchet coin is slightly smaller than a normal quarter, and is struck on the planchet of a Jefferson 5c. Washington quarters...

PCGS 1988-P Washington quarter double-struck with the 1st strike 10% off-center, and the 2nd 93% off-center. Dramatic and generally scarcer on Washington quarters.    MS64