1 Mark high values only for franking by the postal service with double, red overprint "Gdansk". the second overprint is about 0, 3 mm to the top and left shifted, through influence of solvents original stamps colour and gum structure minimal changed, very well perforated, unused condition with original gum, signed Z. Mikulski, Common Starling, Hochkeppler, Ruberg and H. S., certificate Z. Mikulski International Association for Philatelie Experts and certificate peoples Erdwien BPP, the changes at of the stamp are at the rarity still tolerable, only one sheet (20 examples) known, Michel 5.000.-