
It's a three blade and the shapes of the blades are pretty much a thin spey blade, a sheepfoot, and a sabre clip. Handle looks to be mother of pearl and the markings are "J.PRIMBLE BELKNAP GERMANY"
My only real big puzzle piece is the badge on the handle - it doesn't really resemble the typical J Primble crests/shields
Here's the only real info I've found that helps me any: http://www.allaboutpocketknives.com/knife_forum/viewtopic.php?f=2&t=910