National Bank, Specimen 50-Franken, undated (c.1890), green and pale brown, Liberty standing at left, cherub holding up tablet containing value low right, no text at centre, rev. green and pale brown, head of Mercury at left and right (cf P.142 for similar), 'Dec 15/90' in pencil in top margin, perforated SPECIMEN B W & CO LONDON, good extremely fine, rare