Entire letter canc. "ANVERS*6.OCT.51", postmark "LIGNE 5 VALENCIENNES*7.OCT.51", transit "FELDKIRCH*10.OCT" and "TRIEST*14.OCT.1851" in Austria, arr. "ΑΘΗΝΑΙ*12.ΟΚΤ.1851" in blue. Postage markings "16/9/9" (kreuzer) and "180" (lepta). Fine and scarce.