Review of The Day the Earth Froze

I can only remember seeing this movie once, back in my schooldays in the early 70's. The tile being "The Day the Earth Froze". What most comes to mind was the fantastic atmosphere it had, very dark, gloomy almost surreal. It was about a Sampo (as far as I could make out or remember, it was a machine for making either money or gold). Everyone in the movie seemed old, dirty and poor. I think it was their quest to find the sampo or retrieve it or something like that. I would love to know if the movie ever made it to video.