Nikon DE-3 HP Prism Finder for F3 Camera -Bargain, Mirror Out of Position-
This is the "HP" prism with the larger eyepiece.
Note that this prism is listed as a bargain due to the mirror being slightly misaligned, making the image through the prism uncentered. The glass is clean and scratch-free and the body has moderate cosmetic wear. The information windows are working but are slightly obscured by the mirror.