The Hungarian steam paddle tug Stefánia according to a CIA report dated 3 December 1953

An item reported that the Hungarian-Soviet Shipping Company (Magyar-Szovjet Hajozasi Reszvenytarsasag=Meszhart) possessed the coal fuelled steam paddle tug Stefánia with a horsepower of 400hp (continue rating), a crew numbering 15 men.

Source
The report was published on www.archive.org, document number CIA-RDP80-00810A003000260005-5