German submarine SM U-33 sunk anonymous tanker according to the Kriegsnachrichten of the Chef des Admiralstabes der Marine dated Berlin 21 August 1917

U 32-39. ©Warshipsresearch.blogspot.com

An item reported that the German submarine SM U-33 (1) commanded by kapitänleutnant Siess (2) torpedoed and sunk on 28 July an unknown tanker of 5,000 ton underway from Genoa, Italy heading to the east north east of Cap Delle.

Notes

1. Ordered on 29 March 1912, laid down by Germaniawerft, Kiel, Germany with yard number 193 on 7 November 1912, launched on 19 May 1914, commissioned on 27 September 1914, surrendered to the British at Harwich, England on 16 Jnauary 1919 and broken up at Blyth, England between 1919-1920.

2. Gustav Siess (11 December 1883, Hamburg, Germany-14 October 1970 Hamburg, Germany.

Source

Bundesarchiv RM-40-622