VERY FINE. THIS PAIR OF 1867-68 RE-USE PREVENTION ESSAYS, WHICH SHARE SIMILARITIES TO THE BOWLSBY PATENT, ARE BELIEVED TO BE UNIQUE.
The Bowlsby patent for stamp reuse prevention (no. 51,782) called for only a portion of a stamp to be gummed. After being affixed to an envelope the ungummed portion was to be removed, thus preventing reuse of either piece once separated. The essay offered here is not directly linked to Bowlsby, but very possibly represents an interpretation of his patent tried by NBNCo., similar to the other "unknown author" essays in this section (79-E1 thru 79-E6). This ties particularly to lot 190, the Black Jack essay.
Both with pencil notations on reverse from larger piece, likely patent submission papers explaining how the design was to be used. The second is ex Finkelburg and is illustrated in Scott on p. 844. Scott Retail for these is well out of date (and based on the second example's realization in our 1999 Finkelburg sale)
VERY FINE. AN EXTREMELY RARE RE-USE PREVENTION ESSAY.
Pencil notation on reverse from larger piece, probably explaining how the design was to be used