1921/1923: two BLP letters, both with the same advertising but in different colors, advertising eg. for ”Navigazione Generale Italiana” (the national shipping company) on front and on reverse for a type writing machine. Additional advertising (e.g. drinks, Airbrush or toothpaste) in the inner sides. Perfect mint (at one letter a small part of the border is missing, not disturbing for topical exhibitor).
1921/1923: Lotto di 2 buste-Lettere-Postale ”Navigazione Generale Italiana” di colore differente affrancata con 25 cent. PERFETTE NUOVO