1 Kreuzer carmine red (instead of black) on white paper, Plate 1, mint never hinged, color proof - slightly touched at the bottom right, delicate paper wrinkle, photo certificate Peter Sem BPP "Color proofs of the first German postage stamp are rare. They were apparently only produced in small quantities. The present example is in excellent condition." ex. Collection Dr. Stenger (starting price 2000)