The complete set in detail

D027
Sc. Nr. B318
1951 - National philatelic exposition at Wuppertal : Watermark 'B, P and zigzag lines' - 10 Pfg. + 2 Pfg. ; green, black and yellow

D028
Sc. Nr. B319
1951 - National philatelic exposition at Wuppertal : Watermark 'B, P and zigzag lines' - 10 Pfg. + 3 Pfg. ; lilac-carmine, black and yellow