1901 Flying Mercury 5L essays, three embossed essays on white paper affixed to blue card, 89x113mm, with manuscript engraver’s notes, top essay blue with cameo embossing, middle with cameo in blue and bottom design plain white, minor soiling (Image)

1901 Flying Mercury 6L hand painted essay in blue showing Hermes standing (unadopted design) on thick card, 83x78mm, very fine, signed on reverse, a unique showpiece (Image)

1901 Flying Mercury 10L hand painted essay in green showing Hermes standing (unadopted design) on thick card, 73x76mm, with manuscript note below, very fine, signed on reverse, a unique showpiece (Image)

1901 Flying Mercury 3L hand painted essay in magenta showing Hermes seated (unadopted design) on thick card, 86x78mm, signed on reverse, very fine, a unique showpiece (Image)

1901 Flying Mercury 30L hand painted essay in grey showing Hermes seated (unadopted design) on thick card, 72x76mm, signed on reverse, very fine, a unique showpiece (Image)

1901 Flying Mercury 1D final die proof in black (issued colour) on thin paper in sheetlet format, 50x51mm, very fine, signed on reverse (Image)

1901 Flying Mercury 5D final die proof in gold (issued colour) in sheetlet format on thick paper, 51x65mm, very fine, signed on reverse (Image)