These two knives will be auctioned off at the Case factory with the proceeds going to the Case Collectors Club.

From Case:

Tribal Spear Combination Set
This one-of-a-kind set features two versions of Case’s all-new Tribal Spear pattern (TB2010). One knife was custom built by Designer and Case Collaborator, Tony Bose, in his Indiana workshop. It features certified Smooth Elephant Ivory handles; the other was hand-crafted by Case Model Maker, Paul Lipps and features Genuine Mother-of-Pearl handles. Both knives are assembled using Raindrop Carbon Damascus blades and Random Carbon Damascus bolsters and Pawn shield. Each knife has been hand-finished with the makers Proto stampings. The paired set is packaged in a cherry box, complete with two genuine leather carrying pouches which have been autographed by the respective artisans.

I thought it was a Bullock shield?? What is this "Pawn" shield?

I guess Case didn't think "bullocks" was very consumer friendly. They also changed the name from Zulu to Tribal Spear.

They can call it whatever they want. That doesn't change what it is. It is a zulu with a bullock shield.