Hawaiian Tremoloa with original box and manual in Glen Park, New York

This is an older Tremoloa from the 20's or 30's with original box, picks, documentation and many other accessories. It is in perfect working order.
From Wikipedia:
The tremoloa is a stringed instrument belonging to the chord group family of the fretless zither family. It was produced in America in response to the rapid increase in popularity of Hawaiian music during the 1920s, and continued to be produced until the 1950s.
The tremoloa simulates the tonal effects of the Hawaiian steel guitar by passing a weighted roller stabilized by a swinging lever termed an arm, along a melody string. Following, moving the roller after plucking creates tremolo, an effect which gave rise to the its name. Additionally, the tremoloa possesses four chords (C, G, F, and D major), to strum out the harmony. (Wikipedia)