Germany 1919 Air Post Michel 112/A Or 112/B Used?

Germany 1919 air post Michel 112/a or 112/b used? thank's very much

This one is a very difficult stamp and often gets not certification as the color can't be proven after years of storage. The ink printing must be patchy or pale, while the green color has to be the same all over the stamp. You can try and send in for certification as the printing is patchy, about the color it's hard over internet. Here seems to be a 112b: http://www.phila-versand.de/image/c...00x500_0.jpg
Perhaps you try another scan and compare your file with your real stamp.