1781 Entire letter written "Saloniqque le 20 Dmbre 1781" (statement of trading account) canc. linear "DAUTRICHE" to Marseille. At this time the Austrian consulate employed a courrier for official correspondence. However commercial mail was also carried out. On reverse "8" (Kr) and wax seal "SANITATIS SEMLIENENSIS", opened there for disinfection. Very fine.