Lot 81828 – Philippines (Spanish Colonies) – 1855-75, group of seven glass clichés

1855-75, group of seven glass clichés, comprising 1855 5c one cliché in negative, one in black with image reversed, and a very faint but sharp impression in light gray, all are type B of the two types that Sperati produced, 1875 25m, one negative glass cliché and a glass with sharp impression in light brown, 200m one cliché in dark brown and one in faint brown with image reversal; a unique group featuring glass clichés in varied colours, very attractive and fine.