I need the Zumstein catalog for Switzerland. I understand that it is not in English. I am open to the German edition since I am already learning German. I tried googling it but only got "free download" links to spamware. I would like to buy it if possible.
I purchased my Zumstein catalogue (which has Liechtenstein as well) from eBay, and it's in French as well as German, so if you know a few words of either, that will help. I agree that it probably would not be useful for detecting forgeries
About 1.5 year ago I bought a 2 years old (nearly new!) on e-bay for a good price. It's written bilingual German/Frech fully illustrated (much better than Scott). It's very good, with a lot of complementary information. The problema, if you're outside Europe might be the postage, unless you find an America-based seller.