Vintage Musical Instrument - Tremoloa Zither Hawaiian Slide

Description

Antique Tremola produced in the U.S. sometime between 1920 and 1950.
Crack in wood on front and small crack in wood on back.
One sticker is removed from circular opening but other is still intact stating the original price and company that made it.
Only 2 pages of music book- they have signs of age. Item does play