A Stamp Collecting Blog Dedicated to one of the Most Interesting Series of the 20th Century
Tuesday, September 2, 2008
papers on the 1/2 c value
Here I show several blocks. The watermarks are clear for the 1E3 of 1939, the 1E1 of 1935, and the rare Straight Rays diffused (2D) of 1943. These colors are the result of applying the 'equalize' function in Photoshop.
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