The army museum's series for 1914/1915 carries this (AOG?) logo on the address side. The series for 1914/16, which included earlier cards, was produced by
Boige. Many of the museum's cards also carry the logo of the
Société Francais de Secours aux Blessés Militaires - the name of the French Red Cross until 1940.
This was perhaps stamped on by the red cross as a seller of the cards.
