Koella - Gossauer Rapperswil

Mrs. Alwina Gossauer was one of the rare women who had a foto studio. There were also Mrs. M. (Favre)- Eichenberger in Bern, Mrs. M. Fehrlin in Langnau, Mrs Gutkais in Baden and Mrs. Varther in Kirchberg near Burgdorf.
Alwina Gossauer was married with Jean Koella who had a studio for a short time in Zürich. After she divorced she took over the studio in Rapperswil.
There is much more information about Gossaur in this Wikipedia article:

Update February 2018