The source indicates a date of 1869, so Gottschalk would have been 40 years old at that time, whereas he does not seem to have reached his thirties here. After 1865, his face is a bit puffier and he still wears his medals proudly. Moreover, this is the only photo of Gottschalk with sideburns, which he certainly experienced in his younger years. So the date would be between 1855 and 1859. To be refined!

The source indicates a date of 1869, so Gottschalk would have been 40 years old at that time, whereas he does not seem to have reached his thirties here. . After 1865, his face is a bit puffier and he still wears his medals proudly. Moreover, this is the only photo of Gottschalk with sideburns, which he certainly experienced in his younger years. So the date would be between 1855 and 1859. To be refined!