Happy Drupa Promotional
(n/a) 
Reisendes Paar "Drupa" - Promo
(n/a) Theme: Merchandise (1371 sets)
Format: Blister (928 sets)
Released: 1982 (64 sets)
Discontinued: 1982 (48 sets)
Exclusive: Drupa (2 sets)
Export Market: Germany (1967 sets)
Same Ref Number: 00000 (534 sets)
Figures: 2
At least two other different flags are known to me:
1) “DRUPA’82, 4.-17.6.1982, Düsseldorf, Halle 6 1 OG, Stand 61 C 34.” (front) and “Publipress, Finapress, Turnopress, Voltapress, Terrapress, Mediapress. Rollendruckpapiere. Von Profis. Für Profis.” (back).
2) “HAPPY DRUPA.” (logo, front) and “Feldmühle Aktiengesellschaft Rollendruckpapiere.” (back).
Both printed on white paper with black and blue ink.