VERY FINE. ONLY A FEW 5-CENT BLUE LITHOGRAPH GUTTER MULTIPLES EXIST IN USED CONDITION. THIS IS ONE OF TWO ON-COVER EXAMPLES KNOWN TO US.
The Dietz book states "The existence of used gutter pairs reveals that full uncut sheets of 200 were delivered to at least some post offices. Used gutter pairs or blocks are rarities, on or off cover."
Ex Knapp, Kohn and Hart. With 1984 P.F. certificate