"Stamp Inadmissable", 1938

The envelope below also has a Bristol Postage Due mark but for a somewhat different type of reason.  It was posted on 27th January 1938 bearing an 1880 Queen Victoria 1d venetian red stamp as well as a KGVI ½d.  The QV stamps was circled and marked "Stamp inadmissable", and the envelope was charged 2d postage due.

In 1901 Queen Victoria stamps that were earlier than the 1881 "postage and revenue" stamps were invalidated.  The remaining QV stamps were invalidated from 1st July 1915.