The Case XX is a "Big Congress". The knife is a 10 dot made in 1970. It has redbone handles and has been just returned from the Case factory. They replaced the off side handle panel (perfect match), cleaned and buffed the knife blades. The blades were rusty and you can still see some freckeling in the blades. If the knife was mint it list at a very high price. As it is not mint I will take $42 delivered.