A postcard from the period of the sit-in strike on the Coast, with the caption "The first Holy Mass celebrated in the history of the Gdynia Shipyard by Monsignor H. Jastak on Sunday, August 17, 1980," dated August 17, 1980, AUTOGRAPH of Monsignor Hilary Jastak, postcard with a postage stamp, commemorative postmarks: 1. in navy blue: “Occupation Strike August 15, 1980, Gdynia” 2. in red: ...