1871 - blue 20c "Siege" cenceled star "11" from "PARIS R ST HONORE 10 JANV 71" on envelope "Par Ballon Monté" (without text) to "ROMA 17 GEN 71", carried by the "Kepler". Cover insufficiently franked, linear "AFFR. INSUFF / P11", taxed "4" on arrival with Italian Postage Due carmine and orange 40c, canceled in Roma. Some perforation defects on the stamps and some signs on the cover, but extremely rare combination. Bolaffi certificate (Yvert 37 + Sassone ST8)
