Heat a skillet over medium heat. Spread butter on one side of a slice of the rye bread. On the other side of the slice of bread, spread on a layer of Thousand Island dressing. Top with 1 slice of Swiss cheese, 2 slices of turkey, ¼ cup of the prepared coleslaw. Top with an additional slice of cheese. Spread butter on one side of another slice of bread. On the other side spread a layer of Thousand Island dressing. Place butter side up on top the sandwich.
Place into the skillet butter side down and cook, while pressing down occasionally with a spatula, until golden brown on the bottom. Flip and cook on the other side until golden brown and the cheese has melted (about 3-4 minutes per side). Repeat until all of the sandwiches are cooked