Bjur Bros. Co. Piano Serial Nos.

1900	1000
1905	2000
1910	3000
1915	4000
1920	5000
1925	6000
1930	266000
1935	274000
1940	289000
1942	300200
1947	401000
1950	408000
1955	503000
1957	511100

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.