Not sure if it's the gentleman in the photo, but the 1910 census found a Gustav A. Karpe, brother of William Karpe (these docs via the free Family Search site, courtesy the L.D.S.)....
It appears the Karpe family was still at Vermont/Adams in 1910.....
Can't figure the house number but it appears to be in the 2600 block of Vermont, which would put us at Adams....
Gustav was a salesman in the mining industry....
.....this Gustav A. Karpe married a divorcee 5 years his senior, Katherine Bunker Payne, in 1915....he registered for military service at age 43 on 9/12/1918, two months before the armistice....
The 1930 census found Gustav and wife in Hollywood at the Somerset Apts., Franklin Ave. at Gower....his occupation shows as "practioner, Christian Science", same as on his military registration card.
The 1940 census found the couple in Santa Ana, there the trail ends (they told the enumerator that they were in Laguna Beach in 1935, column 17)....