Schweiserische Nationalbank, Switzerland, progressive proof for 50 Franken, ND (1907, First Issue), green and brown, Allegorical maiden and cherub in margin, reverse denomination in French, German and Italian in panel at centre, flanked by head of Mercury, perforated SPECIMEN B.W&Co LONDON, selvage included, in PMG holder 64, choice uncirculated, a beautiful Bradbury Wilkinson design for an exceptionally rare series
BNB B301p, Pick 1p £2,000-£2,600