Istanbul (Constantinople), Turkey (Publisher)
Jacques Ludwigsohn was a postcard publisher at Place Karakeny 21, Istanbul (Constantinople). The firm was also known as Ludwigsohn Frères. About 1909, the company was one of the postcard manufacturers that joined the price cartel Neue Bromsilber Convention (NBC) with the aim to have guaranteed minimum prices and fixed terms and conditions to avoid ruinous competition. The cartel continued until the early 1930s and its president was Heinrich Ross from Rotograph Bromsilberdruck GmbH, Berlin.
