This vintage Casio Casiotone MT-500 electronic keyboard synthesizer is a great find for collectors and musicians alike. With its unique sound and historical significance, it is sure to be a valuable addition to any collection. The keyboard is in need of repair and is being sold for parts only. It has not been modified and is in its original state. The brand is Casio and the exact year of manufacture is unknown. This item is perfect for those who are interested in vintage musical instruments and electronic keyboards.