A translation of what it says on the back:
"In the summer of 1917, the Most Holy Mother of God appeared to three children in the village of Fatima in Portugal and prophesied the threat of great suffering for Russia. Calling to repentance and prayer, the Most Holy Virgin warned:
If Russia returns to God, then there will be peace. If not, she will spread her godless errors all over the world and will cause wars and persecutions on the Church. In the end, in response to the prayers of the faithful, the Most Pure Heart of the Mother of God will triumph: After the conversion of Russia to God, peace will reign among people."
My thanks to Alex (Orthodox Catholic) for the translation.