A list dated end December 1912 mentioned the German ocean going steam fishing vessel Proteus with as homeport Altona, Germany, pennant SD 14 and call sign RWJN.
Source
Archive Ministerie van Buitenlandse Zaken A-dossiers inventory number 235 (National Archive, The Hague, Netherlands).
Source
Archive Ministerie van Buitenlandse Zaken A-dossiers inventory number 235 (National Archive, The Hague, Netherlands).
