Norbert "Nubbs" Barthel is seated in the front row in front of two students wearing dark clothing, marked with the letter 'v'. He was born 1916. Help us identify the students and when this photo was taken.

Photo courtesy of Warren Duerr. Identified are Helen Barthel Duerr, Leo Barthel, and Leander Goeb. Help us identify the people and year photo was taken.