Squeezebox is a class of musical instruments including accordions and concertinas. Accordions and concertinas are also common, and other instruments are sometimes used. All accordions and concertinas have three main components&colon; the reeds, bellows, and buttons or keys. The "Anglo" or "Anglo-German" concertina is, historically, a hybrid between the English and German concertinas. He played concertos, concertinas, continuo sonatas and chamber music; both solos and orchestral parts. Tango orchestras come to consist of two violins, two concertinas, a piano, and a bass. Two-row Anglo concertinas usually have 20 buttons that sound notes. Bass concertinas transpose two octaves down, and piccolo concertinas play one octave up. The Anglo originated as a hybrid between the English and German concertinas. English-system treble and tenor-treble concertinas usually span 3 1/2 or 4 octaves. They also sold copies of English concertinas, German concertinas and bandoneons. Finally, he is a distributor of R. Morse & Co. concertinas for the buttonbox.com. World War I soldiers would deploy barbed wire in so-called concertinas that were relatively loose. Rake and scrape music is played traditionally with Concertinas, Goombay drums, and a Handsaw.