10 penny airmail with plate flaw \"squarer outbreak left at the left tower\" in mixed franking with 20 penny airmail on properly franked franked long distance cover the 2nd weight step from Gdansk to Marburg, cancelled \"Gdansk LANGFUHR airmail * 15.5.23 3-4 N *\" (turning error year date), arrival postmark \"MARBURG (LAHN) 1 d 17.5.25 7-8 V\", the letter should with the airmail to be moved up and was however on the normal postal route transported, crease through the letters half in the lower area, photo expertize Gunnar Gruber BPP \"the stamps are genuine and in perfect quality. \", Michel 1.000.-