World Banknotes

Central Bank of Solomon Islands, a pair of initial engravers workings on transparent acetate showing the outlines of plate designs for the obverse of $20 and $50 from the 1986 Issue, each of these is unique and they are remarkable survivors, as most were simply treated as printers waste (2 items)
BNB B206a, B207a, Pick 16, 17 £80-£120