Engine and boiler for the Dutch 20 tons tug Onrust built at Rotterdam, Netherlands in 1905 according to the Dutch magazine Scheepvaart dated 30 December 1905

A list of the ships launched in 1905 reported that the Machinefabriek Delftshaven, H. de Ridder, Rotterdam, Netherlands built the engine and boiler for the Dutch 20 tons tug Onrust of F. Röpcke&Co., Rotterdam.