British tanker Helka bound for Lebanon according to a letter of the German naval attaché at Istanbul dated 24 February 1940

In his letter dated Istanbul, Turkey 24 February 1940 No. 774 g. reported the German naval attaché to the Oberkommando der Wehrmacht Abteilung Ausland the neutral ships passing Istanbul coming out of the Black Sea and loaded with contraband for or chartered by the enemy. An item reported on 19 February the British tanker Helka with 2,450 ton petroleum and 2,100 ton gasoline underway from Constanta, Romania towards Beirut, Libanon.

Source

Bundesarchiv. German Marineattaché for , Greece, Romania and Bulgaria 1939-1941. RM 12-II/459