This is a stereovision or stereoscopic card, which measures approximately 7 x 3.25 (177x88mm) A fascinating stereovision showing a group of photographs from the 1850s, including what appears to be a stereotype, two small photo albums a estereovisor Brewster, Daguerreotype etc. This is a variant of the"" Artistic Arrangement"" illustrated in Figure 1 on page 2"" The World Of stereographs"" William Darrah. States that"" various photographic and stereographic elements were placed to show the capabilities of the carmera"" . It is claimed to Roger Fenton.