Lot 50115 – X

Switzerland, Winterthur – 1850 2 1/2rp, two glass support clichés, one in negative, both displaying the part of the design being red in the original stamp, one with “cuivre sans verni” (unvarnished copper) notation and indication about the light “B.L.” over the screen which was used for the two minutes and thirty seconds exposure -2’30”-, the example in negative dated November 1948 (horizontal crack); as well as one composite cliché proof on glass including two different P.P. postmarks, of which one framed by the area delimited by the shape of the stamp and annotated “dépoli au papier verre usé” (frosted with sandpaper used), a unique trio.