GUATEMALA Scott 42b, mint never hinged VERY RARE!!!

Guatemala Scott 42b, Mint never hinged with a small paper adherance on back! This is one of Guatemala's rarest errors.  25 copies are believed to have been printed, but this stamp rarely appears on the market and I suspect very few examples made it into collector's hands.  This copy came from a block and thus retained its original gum without hinge.  You can see the second "1886" immediately above the first one, somewhat hidden in the "provisional."  Very few collections have this exceedingly rare stamp!