Bank von Danzig, watermarked paper as used on the 20 Gulden of 1937-38 (2), glued into individual blue card frames, ink and pencil annotations on paper, as produced, rare, this is the only pair of second issue 20 Gulden paper in the Portals archive (2 papers)
BNB B408, Pick 63-64 for type £120-£160

These items are directly from the Portals Paper archive