While coin roll hunting yesterday, I came across this 1980P quarter that seems to have been struck thru something. The obverse and reverse all lack detail in the areas. It does not seem damaged in any other way. It is not glue or any other adhesive, the coin is not bent. The area in question starts at the I in LIBERTY, goes across Washingtons forehead and goes back just above IGWT on the obverse. On the reverse, it starts at the first T in States, takes all of the left wing of the eagle and goes to QUAR of QUARTER. All detail is there but is weaker than the rest of the coin's lettering. Help, any ideas? Thanks in advance of any guesses.