Operation Amsterdam is a 1959 black and white 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 12–13 May 1940 (Whit Sunday and Whit Monday) during the German invasion of the Netherlands. The composer Philip Green composed two original pieces of music for the film, the Pierement Waltz and the Amsterdam Polka.