Brinkerhoff Piano Serial Nos.

1907	3500
1909	9000
1911	62000
1913	80000
1915	100000
1917	120000
1919	140000
1921	155000
1923	170000
1925	190000
1927	210000
1929	226000
1930	230000

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.