Registered owner was Ocean Tramp Tankers Corp SA, Panama, but that was run by:
Tramp Shipping Ltd, Piraeus, and N E Marcou Shipping Agencies Ltd, London (of which N E Marcou was a director). I think that he was probably the son of Emmanuel Marcou from the island of Syros (Syra), who was an active shipowner in the 1920s and 1930s.