these are monoplanar Chorus calipers, and the levers look to have the (kinda rare) century finish applied. Cool brakes, from the late 80's or early 90's. They work pretty well, but I think the campy/shimano wars led to their obsolescence because they are (just a little) porky.

no, wait. I didn't look closely enough. These aren't monoplanar, just later model chorus.