This is a cachet first day cover for the 5 Zt. naval stamp It is dated June 29, 1985, and postmarked in Gdynia.
POLONUS POLISH PHILATELIC SOCIETY MEMBERS RECEIVE A 10% DISCOUNT ON ALL PURCHASES (DOES NOT INCLUDE SHIPPING AND HANDLING COSTS). NON-MEMBERS ARE INVITED TO JOIN POLONUS. PLEASE SEE OUR WEBSITE FOR ALL MEMBERSHIP BENEFITS. MEMBERSHIP IS ALSO AVAILABLE ON EBAY AS WELL. ALL NET PROCEEDS FROM SALES GO TO FURTHER OUR MISSION OF PROMOTINC POLISH PHILATAPHY.