In the scene where Bond has broken with Fiona, he denies deriving any pleasure from their tryst, stating "what I did, I did for King and country" when England in 1965 had a queen, Elizabeth II, not a king.
The phrase "for King and Country" is a figure of speech, and was used in the correct context. To say "he played for all the marbles", does not mean he played for marbles... Not A Slip-up.... just not familiar with the phrase.(or the Queens English )