Thematics

Scouting Stamps (4145 - 4146)
Famous People (4147 - 4149)
Art, Music, etc.
Fauna & Flora Stamps (4151 - 4164)
WWF (4165 - 4169)
Politics, development, ...
AIRMAIL
AIRMAIL Catapult Post (4172 - 4202)
AIRMAIL covers and/or postal items (4203 - 4222)
AIRMAIL Zeppelin (4223 - 4225)
AIR MAIL and ZEPPELIN Brazil (4226 - 4231)
AIR MAIL and ZEPPELIN Germany (4232 - 4304)
AIR MAIL and ZEPPELIN Hungary (4305 - 4309)
AIR MAIL and ZEPPELIN Liechtenstein (4310 - 4324)
AIR MAIL and ZEPPELIN Netherlands (4325 - 4327)
AIR MAIL and ZEPPELIN Austria (4328 - 4334)
AIR MAIL and ZEPPELIN Switzerland (4335 - 4373)
AIR MAIL and ZEPPELIN USA (4374 - 4380)
AIR MAIL and ZEPPELIN World A-Z (4381 - 4393)
TRANSPORT, cars, aviation, shipping, trains, ... (4394 - 4398)
Religion
W.W. I and W.W. II (4400 - 4403)
Cinderellas (4404 - 4408)
Miscellaneous topical stamps (4409 - 4424)