This is a Bonmac manual coffee mill. Its Showa-retro atmosphere makes it a great interior decoration piece. It also functions well as a coffee mill, with a two-point support blade that prevents the shaft from wobbling, allowing for evenly ground coffee. The fineness can be easily adjusted with the screw on the back. It's a mill that looks good and is also highly practical. Recently, Bonmac seems to have released a reproduction version. I am selling this because I have reduced the frequency of drinking hand-drip coffee. Considering the internal wear, I will clean it to the extent of brushing off the coffee grounds. If you are concerned, please disassemble and clean it yourself.