Russia trip 1930, Russian post, so-called Stschapoff registered letter from Moscow 10.9. With 80 K Zeppelin from lower margin and 4 x 20 K children s help in the blocks of four from the margin, all with flight special cancel, reverse arrival Friedrichshafen 11.9, addressed at Stschapoff even as "poste restante" near the International Postage Stamp Exhibition exhibition post office in Berlin, extraordinary letter with pure welfare stamps franking without otherwise more prescribed postal stamps, likewise unusual the shipment by registered post, the for these trip not at all or only very cut down possible was, extremely rare document in normal legitimate condition, by Lukanc details described and with "RR" valued, ex Lukanc (winner 85 B)