The Ukelin is a stringed instrument that was aroundfrom the early 1920s until the mid 1960's.
Ukelins have two sets of strings, one group of sixteen strings tuned to the scale of C (from middle C on a piano to the C two octaves above) plus four groups of four strings, each group tuned to a chord.
You played the instrument by placing it on a table with the larger end toward the performer. The right hand plays the melody on the treble strings with a violin bow, and chords are played on the bass strings with the left hand using either the fingers or a pick.
Each string and chord group is numbered, and sheet music is provided in a special numerical system intended to simplify playing for people who can't standard musical notation.