Bank of England, Cyril Patrick Mahon (1925-1929), 100, London, 20 November 1926, serial number 31/O 49193, black and white, ornate crowned vignette of Britannia top left, value in black tablet low left, printed signature of Cyril Mahon low right, (EPM B219, Pick 324a), less than ten examples believed extant, in PMG holder 30 Very Fine, very rare