I found this C11 among the stamps I recently received. I just thought that the 1928 idea of "Air Mail Saves Time," replete with what was then a "modern" biplane was a really nice touch. Whether or not it adds to the value of the stamp is immaterial. I just like it and thought I'd share it with you.
By the way, there is black ink on a few of the lower right perfs, which up against the black background makes them seem not to be there. I included a photo of the back, which also has a touch, but less, of black on the reverse of the perfs. All the perfs are there and nicely intact. Smiles to all!

