Lot 80058 – German States, Bremen – 1856 5sgr, one reversed image cliché on celluloid

German States, Bremen – 1856 5sgr, one reversed image cliché on celluloid in vermilion, Sperati`s preferred colour for good photographic exposure, a fascinating working cliché with annotations pertaining to the Verichrome film used, the violet filter, and various other production aspects; a very rare working cliché from which Sperati worked to produce his finished reproduction through the process of photolithography.