J
Flag
Company
Country
Japan Line Japan
E. Jenkins & Co UK
Williams Collings  Jarvis UK
P. Johannessen, Tonsberg
Norway
J.I. Jacobs & Co., Ltd., London
UK
Jupiter Lines (Pty) Ltd., Durban 1974-1976 South Africa
Jørgen Jahre Shipping A/S Norway
Ludwig Janssen & Co. Germany
Unknown German inland shipping J-company Germany
Jivraj's Navigation Co., Mombasa
Kenya
unknown xxx
Jaegers GmbH, Duisburg
Germany
Jayshree Teas & Industries Ltd., Calcutta
India
Jens Toft A/S (D/S Jutlandia A/S)
Denmark
Jüngerhans Germany
Galgate Co., Ltd. (John Joyce & Co.) UK
Jensen, Jørgen P Norway
J.H. Jensen, Hamburg
Germany
Jutha Maritime Co., Ltd., Bangkok
Thailand
Ernst Jacob Gmbh & Co KG Germany
Jadrolinija - Rijeka
Croatia
Jonassons Rederier Sweden
Axel Axelson Johnson Sweden
Jadroplov - Split

It may even be that the scan is "wrongly" turned, as maybe the spiral part of the emblem might suggest the letter J.

Croatia