5 Pfg postal stamp sights "of Braunschweig lion" as (only possible) correctly franked single franking on airmail free matter for the blind (on Din A5 folded Din A4 box sheet, due to that the seal traces at 3 sides) of the state school for blind and visually impaired people from "LEBACH 1 - 6610 / 15.-2.90" to Berlin, with content. Rare, by Michel only with - . Valued!