Monarch Piano Co. Serial Nos.

1900	9000
1903	21000
1906	36000
1909	52000
1912	67000
1915	83000
1918	109000
1921	136000
1924	162000
1927	192000
1930	217000
1933	238000
1936	260000
1939	290000
1941	302000

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.