French merchant ship Massis visited the Black Sea according to a letter of the German naval attaché at Istanbul dated 20 January 1940

In his letter dated Istanbul, 20 January 1940 No. 650 g1. reported the German naval attaché to the Oberkommando der Wehrmacht Abteilung Ausland the ships passing Istanbul coming out of the Black Sea and loaded with contraband for or chartered by the enemy. An item reported on 14 January 1940 the French merchant ship Massis loaded with 2,670 ton petrol and 2,564 ton petroleum underway from Constanta, Romania towards Tunis and Algiers.

Source

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