Warne makes what called a new model 7 2-piece base and I'm sure thats the model you have.
Original Model Sevens had only a single drilled and tapped hole for a scope mount on this bridge, but the Predator has two and accepted a one-piece alloy base securely. The bolt has the usual twin opposing locking lugs of generous size, with the bolt’s body retaining a blued finish.
Always been confusing on the two model 7 made.