Engish: special purpose stamps
-Invent.(EN) BA-JO-Ki-KP-KT-M-OC-PA-PRE-S-TE-TG-TR-TRV-TX
- BA-Stamps for travel goods - JO-Newspaper stamps - Ki - Kilopost stamps
- KP-stamps «tête-bêche» - KT-stamps «tête-bêche» with intermediate panel
- M-stamps for military personnel
- OC-Stamps during the German occupation - PA-airmail stamps
- PRE1-PRE838 precanceled stamps
- PU-Advertising stamps or pubs
- S-service stamps - TE-Telephone stamps - TG-Telegraph receipt stamps - TR-Belgian railway and postal parcel stamps - TRV-Railway vignettes