Many (most?) cards name G Lemaitre, Nice, who was presumably the proprietor and maybe A.D.I.A. are the initials of the company name at some time; or maybe ADIA was just th printer of these cards. Coloured photographic view cards have a logo of ADIA in an oval, the example shown is from a card published by Rostan & Munier, also of Nice. Post-WW2 cards use another logo.