What's the name of this old World War 2 spy movie?

Question

In the movie a British (or American) spy gets caught by the Nazis and shot because while eating he uses the fork (or spoon or something) with the wrong hand (i.e. contrary to German etiquette) and so is found out.It could be an American or a British movie..

Answer 1

Something similar happens in "O.S.S."
www.imdb.com/title/tt0038794/

Answer 2

I hope someone can come up with the name for you.
If you want to take the time to search WWII movies, here is a site that will give you some information -- http://us.imdb.com/List?genres=War -- Good Luck! ~-~

Added March 18th ---
You should look up Two-Headed Spy. The plot is This WWII espionage drama is based on the true tale of a British spy, as told in the story by J. Alvin Kugelmass. Alex Schottland (Jack Hawkins) is a career agent for England, having served during WWI. He is assigned to Nazi Germany and rises to the rank of general as WWII breaks out. His contact is Cornaz (Felix Alymer), who pretends to be a clock seller. But Cornaz's identity is discovered, and he is brutally murdered. Schottland overcomes suspicions and makes contacts with a new British agent, Lili Geyr (Gia Scala), who is a nightclub singer. His love for her is first feigned as part of the spy game -- then becomes real. ~ Michael Betzold, All Movie Guide