A lot of these hybred instruments were made in or around Jersey City, nj by a variety of companies, I believe Oscar Schmidt, now in the Midwest, is the only one left.A former band member in the late 60's who was skilled on a variety of instruments had a terribile time with the ukelin.I saw a mandolin guitaraphone years ago in a 2nd hand store, but by the time I went home to get money and return it was sold. It was a zither like instrument with chord groupings and mallets which vibrated on the strings when pushed.Over the years there have been a few exhibits of these types of instruments at librairies in Northern n.j., at least one in clifton, and another I believe in North Bergen.If I see anything like this I"ll post it