Great Purge (Great Terror) Correspondences. 1937-41, two covers from prisoners of Toropets (Kalinin Obl.) Correctional Facility No.12 and Tavda (Sverdlovsk Obl.) Labor Camp No.239/16, addressed to the Attorney General Vyshinsky and Minister of Internal Affairs Beria respectively, minor archival flaws, still F/VF, Est. $150-$200 (Image)