Sounds like a Finnish chapter to Anthony G. Williams book "The Foresight War."
Williams' P.O.D. is in 2004/1934 when a modern English historian travels back in time to 1934 when he advises British industry on which projects to fast-track.
A similar character travels back to 1934 Germany.
Along the same theme, I have been dabbling with a Canadian chapter to "The Foresight War." My chapter starts with a McGill Universify Ph.D. candidate waking up in 1934 Montreal with a horrendous hang-over and vague memories of a momentous fraternity party.