5 million. On 50 000 Mark airmail 1923, corner margin top left, in perfect condition date-appropriate cancelled "Gdansk * 1h 24. 10. 23", certificate with photograph Gruber BPP (for the complete set) "perfect", Michel for normal stamp 450.- - being an upper margin copy unlisted, in genuine used is these issue very rare, being an upper margin copies places the several stamps small rarities and valuables the Gdansk philately dar!