16th Day of the Strike ENVELOPE with commemorative Strike Post Office postmarks, dated August 30, 1980, size 18.7x11 cm
1. Large purple-toned postmark: “Occupation Strike in Gdynia since August 15, 1980”
2. Smaller purple-toned postmark: “Strike August 15, 1980”
3. Black postmark: “SKP Gdynia Strike, August 15, 180”
4. A purple postmark reading “DAY 16”
5. A purple postmark reading “August 30, 1980”
6. Navy blue postmark: “Strike Post Office”
7. red postmark: “21x YES”
8. green postmark: "SKP Strike August 15, 1980"
9. On the back of the envelope, a green postmark reading “SKP Gdynia sit-in strike since August 15, 1980”
SKP – Paris CommuneShipyard in Gdynia
in very good condition, traces of green ink used for stamping [on the back of the envelope]
