Bidspirit auction | Italy - Trieste (Zone A)

Italy - Trieste (Zone A) - 1952, Armed Forces Day, inverted black overprint ''AMG FTT'' on 60L black and blue, right sheet margin single, full OG, NH, VF, this error is not listed in Scott, Sassone #159a, C.v. €5,000, Est. $1,000-$1,200 , Scott #159 var