Scott catalog numbers are copyrighted by Amos Publishing Company and are used here without permission for reference purposes only. Click on the stamp image to view a larger picture. The #11 at right was advertised on the Internet as a #10. Click on the decade to show all the stamps of that period. Note the lack of detail in Washington’s head, and the lack of sharpness in the rosettes and especially the tessellated (cross-hatch) work in the #11 impression. In the image at left, the #10 shown at top left is an example of a high-quality early impression, while the #11 shown at top right was printed from a severely worn plate, with poor-quality ink. Graf Zeppelin in Flight The three US airmail stamps shown above (Sc. OF THE ONE-CENT ROTARY PERF 11 ISSUE, SCOTT 594-ONE OF THE RAREST 20TH CENTURY STAMPS. This definitive airmail stamp was printed on the Flat Plate Press, and it is perforated 11. Severe plate wear on this issue is most evident on examples from plate 1L printed in the late-1854 to early-1855 period. Gorham Collection of Outstanding Used U.S. Some #10’s printed from plates 1e and 1i do show significant wear. Plate wear on this design began to show in the finest lines first. The iron oxide/vermilion mix certainly was more expensive, but rapid plate wear caused by the mercuric sulfide may have been an additional factor. C2) was issued on July 11, 1918, when the airmail postage rate to the tri-city area noted above was reduced to 16 Cents per ounce. Air Mail with Airplane Self-Inking Rubber Stamp Ink Stamper for Business Office - 1-1/2 Inch Small - Blue Ink 1 999 5.11 delivery Jan 30 - 31 Or fastest delivery Jan 27 - 30 Small Business One Line Custom Rubber Stamp (Small) 6,332 89918. The reason for conversion to a new ink formula remains the subject of speculation. This first ink formula was discarded after about four months in favor of the brownish carmine shade.
The ingredients not only gave the ink its distinctive orange brown color, but it also helped produce a superior impression, and its susceptibility to discoloration is very minimal (rust is the result of being exposed to the elements, and it is not susceptible to significant further discoloration). The ink used to print #10’s was a high-quality formula of approximately 80 percent Venetian red (ferric oxide/rust) and 20 percent vermilion (red mercuric sulfide).
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