Intriguing Pen, Ross.
I am not Experienced with Moose Antler, nor have I seen many posted here.
Obviously it is not as Spectacular, as Deer Antler, so the Segmenting, does look like it is in a plain wood.
I love the material that you have used for the Segments, they are Very Attractive.
Have you also used some Soda Can Aluminium Inserts, alongside the Carolina Blue Acrylic Segments? or is what I can see a Dark Adhesive Line?
Your Segments are Uniformly Constructed and Placed Centrally in both Blanks, with Excellent Joint Alignment.
The Navigator Roller Ball, was an Ideal Hardware to Compliment these Blanks.
Congratulations, on your Son's Doctorate.
Brian.