For a 67, you'd want one of the early Polish bakelite grips. They have inverse checkering on the sides, and they are usually much darker in color, almost black with highlights of orange and sometimes green.
You can tell them apart from an inverse checkered Romy grip by the shape of the pinky nub. A Romy will have a pointed pinky nub as seen from below, and the Polish will be more square.
Edit: By the way, that build is a beauty. Congrats!