Ned. Droogdok Mij. building tugs for the Ned. Steenkolen Mij. according to the Dutch newspaper De Sumatra Post dated 13 April 1928

An item dated Amsterdam the 12th reported that at the shipyard of the Ned. Droogdok Mij. at Amsterdam with success two seagoing tugs for account of the Steenkolen Handel Mij. were launched. The newspaper De Indische Courant of the same date confirmed this tiding.