The RMS carried the vast majority of letters and packages mailed in the United States from the end of World War I until the 1960s.
... Gosudarstvennoye Politicheskoye Upravleniye[?] (OGPU, 1923-1934) Narodnyi Kommissariat Gosudarstvennoi Bezopastnosti[?] (NKVD, 1934-1943) Ministerstvo Gosudarstvennoi ...