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fkw"AZO 4 triangles up" style postcards dates to 1904-18 era. So if its a fake which I dont think so, they used the right back for that type of real photo postcard.
For those that need info on stampboxes (real photo cards), this is a good site.
http://www.playle.com/realphoto/ The AZO pics are under "A-B"