My gut tells me you're quite right.
But I don't know in my conscious mind what that card would mean.
Could you clue me in, please--am currently clueless about that.
Others would add, about a lot else, besides.
The kimchi a&&holes (my term for NoKo filth) sent them back to the US, once brainwashed, as sleeper assassins. One of the ''triggers'' to activate their obedience to order was the flashing of the Queen of Diamonds. Ultimately, a little pansy Senator, under the thumb of his wife (Angela Lansbury in the film -- she made a marvelously sinister conspirator, btw) was to be nominated to the Presidency as the goal of the kimchi plot.
If you've not seen the film, I simply won't give away the ending. One of the finest nerve-wracking, tension-filled dramas ever made, in my humble view. WELL worth your viewing, I absolutely guarantee you. Made in 1962, plus/minus a year.
I should suppose that your local Blockbuster would have it. ''Suppose'', because the film was suppressed in the US for YEARS AND YEARS after its debut in theatres (mustn't portray the Commies as bad folks, dontchaknow), but is appearing on cable from time to time now.
FReegards to you!