The photographers were Gumerman & Gardner located at 412 National Ave. in Milwaukee. Gumerman was Johan Georg Gumerman born 10 Sep 1882 in Oberwarmensteinach, Bayern, Germany. He changed his name to George at some point after emigrating to the U.S. and on 16 May 1905 in Milwaukee he married Amanda Mary Jubeck (1885 - 1979). He operated a photography studio with George Gardner as early as 1905, but they moved to the 412 National Ave. address probably about 1906. Gumerman died in Milwaukee, WI on 15 Oct 1962. I no luck finding any information on George Gardner as there are too many listings in that name on Ancestry.com for Milwaukee.