Waltham Piano Co. Serial Nos.

1900	17000
1904	25000
1908	33000
1912	41000
12916	50000
1920	59800
1924	68000
1928	76000
1931	79000

It is remarkable that data on piano serial numbers has survived so well for over a century. However, some inaccuracies are inevitable. These serial numbers are to be used only as a rough guide to a piano's age. An exact date does not make a material difference to a piano assessment. To be within 2 to 5 years is accurate enough to give an informed report on a piano.