JEAN BART No. 2 Entire printed formular "PAR BALLON MONTÉ" with 3 pages of text, franked with lauré 80 c., tied by clear red "PARIS (SC) 15 OCT. 70" to Rio de Janeiro, Brazil with blue arrival mark of December 2; a marvellous letter to South America and a great rarity for any 'Ballon Monté' collection, signed Calves