Found at Garage Sale Warehouse in Beaverton, Oregon, September 2018.. Picture from Oslo, Norway. On the back is notation that the company was established in 1906. The photo is listed as being taken in Kristiania, which is what Oslo was known as from 1877 to 1925 ... so the photo is somewhere in the 1906-1925 time frame.
World War 1, the Mexican Revolution, the Russian Revolution, the Easter Rising in Ireland . . . the sinking of the Titanic and the Lusitania. Spanish flu killed well over 20 million people world wide ...