The stamps are usually printed by photogravure, an intaglio process - the strength of the ink colour determined by the size and depth of the cells etched and engraved in the cylinder : Ponderax fenfluramine : number 3, of a series on stamp production / Servier Laboratories Limited.
- Date:
- 1971
- Ephemera
Where to find it
Location Status Access Closed storesEPH/362/43