375rd Heinrich Köhler auction - Day 1

1873, Unpaid entire folded letter from "Tunisi Poste Italiane 5.FEB.73" via Cagliari 6.2.73 and Brindisi 9.2.73 with adjacent linear "coi Postali Italiani"  to Kerkyra 5.2.73 (Corfu, old style calendar); blue crayon "65" lepta, paid with Athens printing on meshed paper 5l. emerald, 20l.(cover crease) and 40 l., tied by dotted "106", very unusual & very fine margins