In the German foro's I started a discussion on "double prints' and their explanations.goldfish» 07 Jan 2015 13:30 escribió:
The German official view is that they are not worth spending much time to them, occur just hap-hazardly and are not really worth mentioning in the Michel catalogues - the German Bible for philatelists.
The various explanations you can read do not convince me at all!
The REAL double prints where both appearances of the image are equally well printed - just in a different position - are probably without discussion anywhere.