Lot 40845 – 1929 ETA Airlines, artist’s essay for issued desig

1929 ETA Airlines, artist’s essay for issued design in black and red on thin card, together with imperforate colour trial composite sheet of 16 with right column with values overprinted in red, both items with rust stains from paper clips (copy of declaration stating that these unique items emanate from ETA company archives), also a composite sheet as issued with brown gum. A scarce group for the specialist. THE UNIQUE ARTIST SKETCH KNOWN Estimate: € 20’000 – € 40’000