1902ca. De La Rue Minerva head imperforate printers samples with AFRICA 2 1/2d duty plate set of eight mint nh imperf. on unwatermarked wove paper, four different colour combinations (dull green and brown-orange, dull and bright purple, dull green and violet and dull green and carmine) each on both uncoated ordinary and chalk-surfaced paper; fine and fresh, produced when chalk-surfaced paper was introduced for the KEVII stamps of Transvaal and the Natal £1 10s. (Image)

1910ca. De La Rue "Britannia" £20 "OVERSEA DOMINIONS" dummy stamp die proof in deep purple on thin glazed card with 4-5mm margin, very fine and rare. (Image)

1923 Harrison & Sons sample/dummy stamps, 12 different designs inscribed with "SPECIMEN", showing various scenes and rulers in Queen Wilhelmina, Robespierre, St. Nicholas Church, etc., three with small faults otherwise very fine (15).