Looks like LCD display is broken in a stripe across it, see pics, doesn't effect use.

The Casio VL-Tone VL-1 Electronic Keyboard is a vintage retro piece from the 1980s, manufactured in Japan by Casio. This electronic keyboard offers a unique and nostalgic sound for musicians and collectors looking to add a touch of vintage charm to their music. With its distinctive design and classic Casio quality, this keyboard is sure to be a standout piece for any music enthusiast.