The marque S.I.P. was established by the Society as shown in the 1907 directory.
The logo changed from the straight letters to the roundel between cards 1347 and 1372, before early 1906.
By 1914 the marque had been taken over by J Courcier (see here under the marque JC).
Much of the Société's postcard production during the first years of the 20th century reproduced the photos of the Reutlinger studio in Paris.
There is a catalog of these cards in the Image Archive section of the
Ross postcards site.