There IS a few differences. Keywords' tiles are red and there are additional keyword cards that offer bounus points for players who can create a word that matches the given catagory that is in play. Since the 1950's were PRE-TECH, there is an actual key that is utilised to illustrate the concept.
The box is in fair shape. There is scruffiness along its edges, and the bottom top corner edges of the box are torn. Not "too" bad for a game that turns 70, this year. There are 12 keyword cards, the original instruction sheet, and 94 red letter tiles. The tiles measure 3/4 inch square. Eyeballing them, they look like they are the same size as a Scrabble tile. The box measures 16 inches by 8 1/4, and is 1 1/4 inches thick.