Letter sign SD
No. 4, the Ora et Bora, master F. Müller
No. 9, the Finkenwarder, master S. Wriede
No. 1o the Altona, master C. Marquard
No. 11, the Bahrenfeld, master H. Meier.
Source
Archive Ministerie van Buitenlandse Zaken (Department of Foreign Affairs) A-dossiers no. 234 at National Archive at The Hague. The list was not dated but dated presumably from the period between 1894 and 1902.
