I collect too Soviet Occ. Germany stamps.
For color varieties you are right for certification,I need made an investition.
I have many verieties design:Mi#1AB XII(field 86) ,Mi#1AB??(field 95,top right curved ornament broken),Mi#6AXII(field 99),Mi#6AII (field 52) ,Mi#3AII (field 12).For these type of varieties I think a good scan it's enough,or need certification too?
I am a new member and I don't have possibility to email to you.