Operation Amsterdam

Operation Amsterdam is a 1959 British action film, directed by Michael McCarthy, and featuring Peter Finch, Eva Bartok and Tony Britton. It is based on a true story as described in the book Adventure in Diamonds, by David E Walker. The action of the story covers a few days in May 1940 when the Germans invaded the Netherlands. The composer Philip Green composed two original pieces of music for the film, the Pierement Waltz and the Amsterdam Polka.

They meet Jans father at his diamond business house and he agrees to try to persuade other dealers to bring their diamonds later that day for transport to Britain. But as many of the stones are stored in a timelocked bank vault which wont open forhours, they recruit a group of sabotage experts to break in.With the Dutch police, including suspected fifth columnists, on their trail, the group manage to break into the vault and recover the diamonds. The three visitors make their escape whilst the armed Dutch helpers hold down the police and soldiers. They drive back to the coast, barely dodging German bombers. ........

Source: Wikipedia