Bank of England, Cyril Patrick Mahon (1925-1929), 50, Leeds, 14 October 1925, serial number 43/X 14273, black and white, ornate crowned vignette of Britannia top left, value in black tablet low left, printed signature of Cyril Mahon low right (EPM B218d, Pick 323e), in PMG holder, paper makers notch, 40 Extremely Fine. Sole top grade example on PMG Population Report, rare