Lehr & Co., H. Piano Serial Nos.

1909	18000
1911	22500
1913	27500
1915	31500
1917	36000
1919	40100
1921	44700
1923	48500
1925	52300
1927	56000

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.