Kelso Co. Piano Serial Nos.

1901	17000
1903	21000
1905	29000
1907	33000
1909	37000
1911	42000
1913	48000
1915	54000
1917	61000

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.