This music box plays a 27” steel disc called a “Tune Sheet.” Holes punched in the disc engage the teeth of a gear, and as the gear spins it plucks the tine of a musical comb. Each tine of the comb is tuned to a precise musical pitch. When in operation, the proper tines are plucked at the right rhythm and pitch to create beautiful music. This Orchestra Regina was produced by Regina Music Box Company, Rahway, NJ between 1892-1920. More than 100,000 were sold and sales were over $2 million each year. They remained very popular until the introduction of the phonograph.