Manufactured by Sankyo, the world's leading producer of musical movements, this sturdy 18 note movement is the most widely used type of musical movement placed in craft, hobby, gift and novelty projects. Cylinder Music Box The pins embedded in the cylinder drum click the comb teeth, then play the melody. It was born in Switzerland as an accessory of the watch and developed.Cylinder Music Box The pins embedded in the cylinder drum click the comb teeth, then play the melody. It was born in Switzerland as an accessory of the watch and developed. Wind the music box up and the drum turns and the pins on the drum pluck the teeth on the comb and make the beautiful melody. The mechanism on these movements is encased in a white plastic shell that can be removed if you wish to see the movement rotate and play. The movement with shell measures 2- 1/8"L x 1- 7/8" W x 1- 1/16"H. When fully wound it plays approximately 2-1/2 minutes. It has 18 notes to provide a nice range of tones. It winds from the bottom and 3/4" long gold T-Bar winding keys is included. We ship fast from our US warehouse -beware of other sellers who ship from China.