30 Pfg. Dela balloon postal service stamp red on matt cobalt with plate flaw" 'D' from 'the air-raid protection' above broken" on balloon postcard with 6 Pfg Fredericus with lower margin from "RÜCKENWALDAU 25 / 8 33" to Hamburg with appropriate Cachet, in perfect condition, scarce variety, only a few pieces known, Michel 1.500.-