Édouard Baldus (1813-1889 )Exposition universelle de Paris, 1855. Palais de l'Industrie. Print on salted-aluminum paper mounted on cardboard. Number "27" in the negative at the bottom right. Signature stamp on the mount in the lower right corner. 32,8x44cmIn his monograph on Édouard Baldus, Malcolm Daniel suggests that this signature stamp is affixed to mounts and prints between 1854 and 1858, rarely afterwards .