I stand corrected, and should have known better. I've watched K-22 boxes for years, and 1956 would be a blue box. Gold boxes phased out around 1954, and I've seen a mix of gold and blue in 1953.
So the subject at hand is likely to be a blue two-piece box, Smith & Wesson Inc. / Springfield Mass - solid border on top, and other embellishments, with various corner reinforcement colors - red, silver, blue noted....
And as bdGreen and RKmesa noted, there are variations to accommodate the target stocks, too. (I did not know that! Happy to now.)
It's interesting to watch these boxes and try to track the evolution. I started doing it about 10 years ago for the K-frames and have slacked off for the last several. Got into other interests with the Chiefs Special more recently and have a fair amount of CS box related data collected if anyone is ever of interest.