Rhine-Main 1912, so named "green dog", ten copies the 30 Pfg airmail stamp on both sides on numbered officially red card with lfd. No. 1905 and 5 Pfg Germania with special cancellation Darmstadt 22. 6. addressed to the palace Darmstadt, two values reverse glued close to the edge and through it upper perforation defective as well another stamp with small notch, extreme rare card, the only in approximate 80 copies recorded is.