Lot 50108 – Sweden – 1855 24s, group of twelve items

Sweden – 1855 24sk, group of twelve items including one master negative which is the foundation of producing the glass clichés, four glass support clichés of which one in orange (dated 3/41), the others in deep-brown, light-brown and grey, three clichés on celluloid all in red-orange, two dated 4/43 and all with Sperati notations, as for example « voile vio – 17° x 6 x 1′ 10″ 319 Pathé » (meaning the usage of a violet filter to obtain a good contrast, 6% of a chemical substance and under the 17°C environmental temperature an exposure to light of 1 min 10 secs was made), one exposure trial in brown, three reproductions of the actual stamp including one hand signed with cancellations; a unique array of material providing insight into how Sperati reproduced this most important issue of Scandinavia; the « Ultimate » collection having just two reproductions of this value and no clichés or matrices are mentioned by the B.P.A.