A few other publishers have used a cockerel in their logo. Ones represented here are G LECOCQ, Amiens, an unidentified publisher, and Ch Ramel & Cie, Paris.
The Glorious 75 was the French 75 mm field gun dating from 1897 and used extensively in WW1, see en.wikipedia.org/wiki/Canon_de_75_mod%C3%A8le_1897.