I ran across this over at Pastnotes:

½¢ Stamp Overprinted “Postage Due”

Bertram W. H. Poole, Los Angeles, recently showed me a copy of the 1922-26 ½¢ Nathan Hale overprinted diagonally in
one line, in black, “POSTAGE DUE.” Mr. Poole found a few of the stamps in a lot purchased from the estate of a San Franciscan,
who had been in the postal service, also a number of covers showing the stamps used to collect a fee of ½¢. He believes it may
have been a provisional, hastily made up and pressed into service by the postmaster of San Francisco for a short time just prior
to the issue of the regular postage due stamp of that denomination. Postmaster are frequently called upon to exercise their
ingenuity and improvise a makeshift when rates change and there are no special stamps available.

– George B. Sloane
Sloane’s Column
Stamps
May 22, 1937

Has anyone ever seen one of these? Do they exist?

No Tags