Riewe's widow moved to Sukhumi, where at that time there was workforce of 300 Germans working at Manfred von Ardenne's Laboratory A, in Sinop, a suburb of Sukhumi. She eventually married the German draftsman Willi Lange and gave birth to his daughter in 1950; the family stayed till 1950 when Lange, his wife, Lange's daughter Hannelora, and his wife's children by Riewe, moved to Sungul', where he worked at Nikolaus Riehl's Laboratory V, also known under another cover name, Объект 0211 (Ob'ekt 0211, Object 0211).