Offset printing, or more correctly, a setoff. This happens when damp sheets of stamps are stacked on top of one another; it is NOT a printing process, which is why the term "setoff" is more correct.
Wasn't the Balkan Entente of 1934 a mutual defense agreement between Greece, Romania, Turkey, and Yugoslavia, intended to guarantee the signatories' territorial integrity and political independence against attack by another Balkan state?
That one from 1934 was the "Petite Entente" ( Romania, Yugoslavia, Tchekoslovakia ); in 1940 there was "Entente Balkanique" with the countries you did mention.
Depending upon the printing process, they can also happen when a sheet of paper doesn't feed, and the stamp image is 'printed' directly onto the press. The next sheet of paper through the press can get inked on both the front and the back, with the back being mirrored.
I concur with both above explanations( doug2222 & Cjd ). But as the imagines on the back of the stamps are so clear, so neat, I am leaning towards Cjd's explanation for all the examples I posted here so far.
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Stamp Community assumes no liability for errors. Copyright 2005 - 2026 Stamp Community Family - All rights reserved worldwide. Use of any images or content on this website without prior written permission of Stamp Community or the original lender is strictly prohibited. Privacy Policy / Terms of UseAdvertise Here
Posted 07/01/2013 4:04 pm
