Banca Nationala a Romaniei, watermarked paper as used on all 20 Lei notes issued between 1909 and 1929, and all 100 Lei notes issued between 1910 and 1940, glued into individual cream paper frames, ink annotations on frames, as produced, extremely rare (2 papers)
BNB B213, B214, B216, Pick 20, 30, 21, 31, 33, 50 for types £200-£260

These items are directly from the Portals Paper archive