Lot 81494 – Argentina, Buenos Aires – 1858 “Barquitos” 4p one glass cliché in black

1858 “Barquitos” 4p one glass cliché in black with Sperati`s production notes at base detailing aspects of photographic exposure and chemicals required, and 5p a similar cliché with Sperati`s manuscript annotations; an attractive matching pair that takes us inside the Sperati workshop.