I'm not an expert on Queen handle materials; however, based on my experience looking at hundreds (possibly thousands) of Queen knives over the years I have identified at least three similar but different types of "stag bone" used on Queen and Schatt & Morgan knives all of which are bone that has been "carved" or jigged to resemble genuine stag:
1) Regular Stag Bone which is white and brown/black. Comparable to Case's 6.5 bone stag but without Case's characteristic "toasted" colors: brown, beige and yellow. (See below).
2) Brown Stag Bone which is mostly dark brown but often has lighter brown and white areas along the edges. This is what I think your Mountain Man is, Thomas.
3) Amber Stag Bone (ACSB) which has obvious amber (also varying degrees of red, orange and yellow) highlights.
Here are some examples:
Queen Regular Stag Bone
Case 6.5 Bone Stag
Queen ACSB Mountain Man