Blade and Mounting for a Short Sword (Wakizashi)

The image shows a short sword blade and mounting for a wakizashi by an unknown artist. The sword has a long, narrow, curved gray blade with a slight upward curve near the tip, and a darker gray hamon. The blade is shiny and smooth with a long, thin groove down its center. The bottom 2 inches of the blade is a darker metal with a small circular hole. The background of the image is black.