dulcitone

noun1

1. •
   A keyboard instrument in which sound is produced by a range of tuning forks, which vibrate when struck by felt-covered hammers activated by the keyboard.

   • A dulcitone had just arrived there on which I played, but I am very glad I didn’t close with our Colonel’s offer to buy one—the tone is so wretchedly thin, especially the bass, which has none at all. — 1917