Red Cross Nurses with Flag, Antique Real Photo Postcard

I've said many times that the Red Cross emblem is my favorite logo of all time, and I look for it in all permutations. How happy then to find this old photo of a pair of WWI era Red Cross nurses in their uniforms, holding a red cross flag to boot. (And with a cat at their feet, too!) Wonderful faces on these two women, Latina I presume, with the older looking figuratively if not literally very much the mother to the younger, who looks perhaps a bit less enthused! 

5 3/8" x 3 7/16". C. 1915, unused postcard back and in good condition.