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How old is my Yamaha Piano

 

                  In 1987, to celebrate its centennial, Nippon Gakki change its name to the Yamaha Corporation. Today it is the largest musical instrument manufacturer in the world, producing about 130,000 pianos a year.

Dates and serial numbers when the pianos were manufactured 

1920 2100
1930 10163
1940 31900
1950 44200
1960 122000
1970 980000
1980 3030000
1990 4820000
2000 5860000
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