The extenders are for Exakta, but the pop up finder is a waist level finder and not a prism.

The WLF will fit any VX, VXIIa, VXIIb, or VX1000, but this one is styled for the V, VX, or early VXIIa cameras with script lettering. The finders were restyled for the late VXIIa, VXIIb, and VX1000.
bob