Title:Neotpravlennoye pismo Year:1960 Rated:Not Rated Genre:Adventure / Drama Language:Russian Country:Soviet Union Director:Mikhail Kalatozov Writer:Grigoriy Koltunov / Valeri Osipov / Viktor Rozov Actors:Innokentiy Smoktunovskiy / Tatyana Samoylova / Vasiliy Livanov Plot:Four geologists search for diamonds in the wilderness of Siberia.