Polish tug Brzeg of the Szczecin branch of the Polish Central Administration of the Inland Waterways according to a CIA report dated 21 October 1955

An item reported that the Polish Central Administration of the Inland Waterways resorted under the Polish Ministry of Shipping. There were branch offices at Wroclaw (former Breslau), Szczecin (former Stettin), Bydgoszcz, Gdansk (former Danzig), Warsaw and Krakow. The Szczecin branch office had as address Ulica Maolopolska and possessed the tug Brzeg with as horsepower 250 hp.

Source
The report was published on www.archive.org, document number CIA-RDP80-00810A007900950006-8