19 x 29 cm Wax seal with custodia on parchment paper Signed by Chief Secretary of the Military Collegium P.A. Izhorin and Secretary A.Y.Yakovlev. Sergey Gavrilovich Plautin (1703-?), engineer. Assessor of fortification office, engineering art teacher. In 1758 he was dismissed from service in foreman grade. In 1745-1748 was in secret mission to make a detailed military defense map from Semipalatinsk to Teletskoe lake.