1921 'Buste Lettere Postali' advertising lettercard (31 serie Nazionale) franked BLP black type opt 10c red & 1L brown & green 'BLP' opts tied by 'Napoli 30 10 21' cds, to Milan. SG B129 & 136 cat £3110, Sass BLP5 & 12 cat €4700 - both for loose stamps, the 1L cat €7500 on cover. Pmks probably CTO per favour but still very rare & interesting item. (P)