The Czechoslovakian screw steam tug President Benes[j] according to a CIA report dated 16 January 1952

An item reported that the Czechoslovak Oder Navigation Company (CSPO) possessed the in Holland built twin screw steam tug President Benes[j] with a horsepower of 500hp, a draught of 1,50 meter and which served on the Szczecin-Kostrzyn run.

Source
The report was published on www.archive.org, document number CIA-RDP82-00457R010000110009-3