Serbian National Bank, watermarked paper as used for the 50 Dinara of 1941, featuring a boy with plumed cap, as produced, the only Serbian watermark found in the entire Portals archive, extremely rare
BNB B305, Pick 26 £150-£200

These items are directly from the Portals Paper archive

Please note that contrary to the catalogue description, this is NOT the only example of this watermark in the Portals archive. There are several other examples that were filed under Yugoslavia and as a result, will be included in a future auction.