Sea and Clouds by the Famins Constant Famin. The card is imprinted on reverse "C. Famin Photographe / 26. Avenue D'Orleans" but with the remarkable addition in period pen "et Madame" ("and Mrs. [Famin]"), apparently indicating that Famin's wife was involved in the production of either the original images or their CDV-sized versions. Price: $350.
From a group of Famin CDVs, some found signed "...et Madame Famin" and others simply "...et Madame", but clearly all with the same intent, see comparison of inscriptions below.
Comparison of signed images found in this group: