1918-1920, Specialized exhibition collection on about 140 leaves on the definitive values incl. unissued 1920 & the trident overprints, mint hinged, MNH, used and some covers, noted shades, cancels, varieties, majority of tridents signed Stohm.(ann), UPV, Dr.Seichter, Diepenbroek, Breul, Liska, etc., should be inspected to be fully appreciated, ex collns. Dr.Brom (Image)