The Laurence Pope Collection of Portuguese Colonial Banknotes - Part One
Banco Nacional Ultramarino, Portuguese Guinea, colour trial 500 Escudos, 30 June 1964, serial number C000000, black specimen overprint and two cancellation holes, specimen number 18 on reverse, in PMG holder 65 EPQ, gem uncirculated and very scarce
BNU PG54ct, Pick 42ct £240-£300
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This is the BNU plate note