Charlie, yes, it's black Micarta. Some models seem to be more popular than others, the Model #22 is apparently not one of the popular models.

Andy Thornal Company, a (former?) RMK authorized dealer, often used 'just' black & white spacers - Denmark Sporting Goods, a past authorized RMK dealer, often used 'just' red and white spacers. The spacer configurations outlined above were very common with Randall knives sold thru these two dealers during the 1970's.

Hope that helps