General postal service ( 3. Planned trip), incoming line from Hungaria, outer envelope franked with twice 10 Filler and 3 time 1 crown, stamp the dive boat letter collection point near the post office Budapest 72 from 19.1.17 and with red L 1 " submarine cover to Bremen provided", good legitimate condition, rarity and only a few documents have become known, totally undervalued, Michel 4000,-;