Lot 50073 – British East Africa – 1890 4 annas. Group of 11 items

British East Africa – 1890 4 annas, group of 11 items including one master negative retouched in red and including the frame around the design in order to block the light entering from the sides in the following step of the process, eight glass support clichés in a variety of appropriate shades to create the contrast required including brown, grey and red; and two genuine values with design chemically removed to highlight the cancellation to obtain an accurate shape; a magnificent group with the important master negative and the sole clichés known.