This number was only used for small blocks.
Certainly not for applying on the reverse side of the blocks.
- Geographic Origin
- Short Description
- Large format Orval block, imperforate - Curiosity: Number on the rear
- Year of oldest stamps
- Name official catalogue
- OBP / COB
- Catalogue Number
- BL12 - Cu
- MNH (Mint never hinged)
- Has certificate or expert signature