Two ninth-plate daguerreotypes to form a stereoscopic pair.
Quarter-plate thermoplastic case with Mascher viewer built in, imprinted "MASCHER'S IMPROVED STEREOSCOPE / PHILADA. / PATENT / MARCH 8TH 1853"; printed label in case, "FROM R. H. VANCE'S / DAGUERREAN ROOMS / SAN FRANCISCO, SACRAMENTO, & MARYSVILLE, / CAL."
Imprint on case medallion, "Our Father which art in heaven hallowed be thy name / but deliver us from evil / MATTHEW VI, 9".