6 Kreuzer ultramarine-blue, Prussian Eagle in Octagon, two examples clearly and perfectly cancelled with double-circle "WORMS 1278 5-6V" (1867), and black-grey supplementary Franco handstamp on folded letter wrapper to Arnhem/Netherlands, stamps with well-executed roulette all round and fresh colour, violet signature on reverse, photo certificate Maria Brettl AIEP (2018) "in perfect condition", Mi. 550.- ex Boker collection