BUY 2017 Istropolitan numismatic cover with €2 coin

I will buy - exchange - sell: Numismatic cover issued by Slovak Post - POFIS on the occasion of Num. cover of Istropolitana.. LOOKING for only number : 104, Offer. Agreement sure. Exchange is also possible for other nice numbers. I will also offer for exchange other nice numbers of numismatic envelopes issued up to the year 2023 (only for exchange for the listed numbers) Email: jamk@azet.sk