I am a great lover of caper - heist - movies. And this one is a very good as rare too. It is based on a true story, the Brink's robbery that took place in Boston in 1950. William Friedkin and Marvin Chomsky already made films about this affair.
It tells with many details how the hoods proceed to steal the bullion.
There is not really a leading character in this story, not great actors either. And it makes it more interesting.
It is however a grade B movie, shot with a tiny budget. Do not expect car chases and gunfights.
I am surprised that no other IMDb user has commented it yet.
I recommend it for those who can catch it on a TV broadcast these days.