I purchased the subject undated RPPC (Real Photo Postcard) (not postally used) depicting a teenage girl, identified on the back:
"From Bertha & Willie Wellberg to Cumal Kuhlman"
Bertha Alvina Wellberg, born 11 Jun 1910 in Lake Benton Township, Lincoln Co., MN, died 11 Dec 1975 in Hennepin Co., MN, was the daughter of a farmer, Dietrich Henry/Heinrich Wellberg (1873-), and Anna Kuhlman (1881-). She appears in a Public Member Tree posted on ancestry.com and is listed in the 1920 and 1930 Census data for Lake Benton Township, Lincoln Co., MN. She is included in "Minnesota, Births and Christening Index, 1840-1980," "South Dakota Marriages, 1905-1949," and "Minnesota Death Index, 1908-2002." On 5 Feb 1935, in Hamlin Co., SD, Bertha married Leonard Ralph Tellinghuisen, born 30 Sep 1908 in Sioux Falls, SD, died 21 Mar 2001 in Cloquet, Carlton Co., SD.
Bertha and her older brother Willie addressed this postcard to their cousin Cumal Viola Kuhlman, born 8 Mar 1912 in IA, the daughter of Albert Christ Kuhlman and Edith Golda Anspach.