Lot 50103 – Spain, Local Post Madrid – 1853 1cu & 3cu, group of eight items

Spain, Local Post Madrid – 1853 1cu & 3cu, group of eight items comprising 1cu with one trial exposure of the type A on photographic paper pencilled below « dur fort » (hard strong), one reproduction with the impression on the gummed side apparently being a new type; the 3cu with negative glass cliché in brown-grey with Sperati indicating « 15°x6x1’30 »  » referring to the temperature, the 6% of a chemical substance used and the exposure to sunlight of one minute thirty seconds (these elements were produced in January 1916, a period in winter when the temperature inside his laboratory could easily reach that low figure), four additional glass clichés with image reversed as usual in different colours and notes including the date « 1/16 » and in two different times of sunlight exposure, temperatures and substance percentages, as well as one cliché on celluloid in orange-vermilion to obtain a good contrast and designated « verichrome » (the Kodak panchromatic film featuring extremely fine grain); a unique and most fascinating group of these rare stamps. As it is the norm despite the risk of sounding rather repetitive, when we present clichés and we compare the « Art of Sperati » collection with the « Ultimate » one, the latter did not contain any matrix, glass clichés or clichés on celluloid of the compared issue.