The Czechoslovakian government Gotwald Shipyard build 4 tugs for the CDSP according to a CIA report dated 6 October 1953

An item reported that the Czechoslovakian government Gotwald Shipyard at Komarno, Czechoslovakia [nowadays Slovakia] built 4 welded tugs for the Czechoslovak Danube Navigation Company (CSDP) each with a capacity of 100 railroads carloads. The tugs were however not well built while on short notice cracks could be seen in the hulls and lacking a sufficient number of iron stays needed for the reinforcement. The tugs were now used for light cargo transport over short distances.

Source
The report was published on www.archive.org, document number CIA-RDP80-00810A002300930003-1