This photo is from c. 1930. The older girl in the photo was born about 1922. Her mother died in 1935. Have established it is the Von Hoffmann Aircraft Co. of St. Louis, MO and that the plane is likely a Ryan Brougham B-1.
A 1902 listing of pharmacists mentions a George F. Wolfer as working at the McNair Avenue Pharmacy. In 1912 Arthur Kring purchased the store after it was closed by creditors and was to reopen it after remodeling.