Lot 50633 – United States – New York City – 1845 5c Postmasters’

United States – New York City – 1845 5c Postmasters’ Provisionals issue, cliché on celluloid in light grey, type B of the two types produced by Sperati, with dated notation “Pas tiré (denoting that this result was not satisfactory) cliché 3/50″, also “Isop” for Isophan (a type of celluloid from Agfa) and “Calor en 3′ ”, indicating the use of the brand of the lamp used and the 3 mins of light exposure, as well as “voile léger” for light filter; an interesting and very rare example with rich Sperati production notes.