Recently picked this beauty up albiet a bit worn, I suspect it's the same (?) celluloid as the one below just better preserved. These later uncommon colours don't come along often.
It's also a slightly shorter full sized pen at 5" compared to the more common ~ 5.25" and as is fairly common the inlaid crescent has fallen out . I suspect these shorter pens where just before the move to Chicago.
Regards
Hugh