Weimar, photo studio of the court photographer Friedrich Hertel (Hofphotograph Friedrich Hertel). 1888.
Photo: 18.5 x 8.9 cm. Passe-partout: 20.3 x 9.5 cm.
The photo is pasted onto Hertel's branded passe-partout.
Under the photograph Duke's signature in black ink in Latin "Charles Alexander / 8/20/88".
Slight staining, owner's marks on the back.
Karl Alexander August Johann of Saxe-Weimar-Eisenach (1818-1901) was Grand Duke of Saxe-Weimar-Eisenach since July 8, 1853 and the grandson of the Russian Emperor Paul I.