Ivan the Terrible: Back to the Future
This is a Russian film and is considered one of the best Russian comedies ever made. This is the US title and plays on the Back to the Future angle, but this film was made in 1973, well before the US film was made. This film has a scientist with a time machine in his Moscow apartment, and through a series of events, he, an apartment thief and the building superintendent go back to time of Ivan the Terrible. The thief and the superintendent get stranded in the past while the scientist and the real Ivan go 'back to the future'.
A lot of this film seems inspired by the Mack Sennett comedies, but that is not a bad thing. It is funny, and does prove that Russians have a sense of humor, and had one even in the Soviet days.