Souvenir sheets issue OSTROPA with additional franking on foreign countries registered letter to Kuopio / Finland with reverse arrival stamp. As 20 Gr. Letter sends and with 55 Pfg franked, what then correctly franked was. The souvenir sheet point at in the "o" and "p" of the watermark slight breaches on, is but otherwise entirely intact. The adhesive traces are by of this issue be considered normal. As correctly franked international franking rare! Michel .