Lot 80059 – German States, Bremen – 1856 5sgr, one spectacular negative cliche block of four

German States, Bremen – 1856 5sgr, one spectacular negative reversed image cliché block of four on translucent glass with black border around, featuring one very unusual flaw white spot on one stamp that is marked “47 fixé” (perhaps referring to year 1947), also “taches verre chassis” with an arrow pointing to the black border; a unique cliché featuring Sperati`s working notes.