Vintage Japanese Enamel Yamaha Harmonica Sign. Double Sided Patina Beer. Beautiful old vintage Japanese enamel Yamaha Harmonica Sign. Written in Katakana in red and blue against a white background. Striking simple Industrial look. This probably came out of the production factory. 36.5cm x 45.5cm. Please check out my other listings for more Japanese vintage, retro and antique bits. In 1914, Nippon Gakki Co. The company immediately began exporting these instruments overseas, and they began to gain popularity around the world. Production later ceased, but resumed in October 1945. Thereafter Yamaha stopped using the butterfly logo, but Yamaha harmonica had brought joy to people with their beautiful tones and solid construction. Yamaha has now discontinued production of harmonicas.