20 Pfennig middle ultramarine |
20 Pfennig middle ultramarine, wider stamp |
20 Pfennig bright ultramarine |
20 Pfennig blue |
20 Pfennig blue, thin paper |
20 Pfennig dark blue |
20 Pfennig grey ultramarine |
20 Pfennig prussian blue |
20 Pfennig violet ultramarine |