A collection of Bank of Zambia banknote progressive stage die proof engraver's test strike colour trials for banknotes issued 1974 and later, including two twenty kwacha note obverse specimens in purple with portrait vignette of President Kenneth Kaunda, on oversized paper/card, together with a group of various die proof specimen portrait vignettes and cut-outs of President Kaunda, as used on the aforementioned notes (all very fine, some handling marks). Provenance: from the personal archive of the late Alan Dow, master banknote engraver to Bradbury Wilkinson & Co and the Bank of England.