There are two shows covers created by the Polonus Philaletic Society in conjunction with the Polpex 1969 stamp Exhibition in Chicago. The covers are also listed separately.
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 PROMOTING POLISH PHILATAPHY.