In general you have to assume all are forged, since the forged outweigh the genuine by at least 100:1. There used to be a great site for these, but it looks as if he's taken the Albert I stuff down and only left the Merode. https://www.postzegelsdemerode.be/nl/index.html
"There is no guidance in the Scott Catalogue" Scott Catalogue is not made or published to be a answer to everything . That is why people publish books .I been buying Scott Catalogs for 52 years ,they do a decent job .
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