Diagram of Integrated Services Digital Network
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| Country: | Germany, Federal Republic |
|---|---|
| Issue: | Europa (C.E.P.T.) 1988 - Transport and Communications |
| Date: | 1988-05-05 |
| Paper: | fluorescent |
| Print: | Offset lithography |
| Perforation: | comb 14 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 80 German pfennig |