Word Master Mind

This game is from 1975 and was awarded game of the year at that time. Included in the box are the Word Shield, De-Coding Board, Letter Tray, 21 black key pegs, 21 white key pegs, and ~300 letter tablets. The box says that the game came with ~404 letter tablets, so some are missing, but 300 seems like plenty to play the game successfully. The only other thing missing is an International Word List, but the game can be played without this. Instructions are on the back of the box. The top left corner of the front of the box has a small tear.