Clarendon Piano Serial Nos.

1903	1000
1905	11000
1907	18400
1909	28300
1911	37300
1913	54000
1915	64000
1917	74000
1919	84000
1921	93100
1923	100000
1925	106600
1927	111000
1930	117000

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.