Memel stamps, with black overprint "MEMEL 50 Pfennig" on 50 Centimes, Prussian blue, used, postmark "(WISC)HWILL (MEMELGEBIET) 27. 5. 22 8-9 V.", well preserved, unsigned, expert opinion by Tobias Huylmans BPP (2018), "some shortened or missing perforation tips on the left and right, otherwise flawless", Michel catalog value 450,--