Two boilers for the German tug Bertha built in the Netherlands in 1901 according to the Dutch magazine Scheepvaart dated 28 December 1901

A list of the ships launched in 1901 reported the delivery of 2 boilers for the tug Bertha by N.V. Wilton’s Machinefabriek en Scheepswerf, Rotterdam, Netherlands for account of H. Bovens, Ruhrort, Germany.