5 Pfg till 1 Guilder "10 year to be available the free city of Gdansk" on unmailed First Day Cover with postmark "Gdansk 1af 15. 11. 30", according to certificate with photograph Oechsner BPP is the piece in excellent preservation (Mi.-no. 226 missing tooth), these first day cancellations of this issue are very rare and become hardly once offered!