Ackerman & Lowe Piano Serial Nos.

1904	26900
1907	32500
1910	43750
1913	53000
1916	6250
1919	70500
1922	80000
1925	91800
1928	100000
1931	106000
1933	108000

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.