| YEAR |
PITCH |
PLACE/SOURCE/COMMENT |
| 1715 |
A=419.9 |
England, John Shore |
| 1740-1812 |
A=424.1 |
Eutin, Germany |
| 1751 |
A=422.5 |
London (Handel's tuning fork) |
| 1754 |
A=415 |
Dresden G. Silbermann Organ fork |
| 1780 |
A=421.6 |
Vienna. This is the pitch which Mozart used |
| 1783 |
A=409 |
Paris. Fork used by Taskin, Paris court tuner |
| 1800 |
A=422.7 |
London. From a fork belonging to Broadwood |
| 1820 |
A=433 |
London Philharmonic Pitch |
| 1829 |
A=425.5 |
Paris. Pitch of the piano at the Opera |
| 1834 |
A=441.8 |
Berlin. Orchestra and Opera |
| 1834 |
A=445.1 |
Vienna. The highest fork Scheibler listed |
| 1834 |
A=440.2 |
Stuttgart. Congress of Physicists |
| 1836 |
A=441 |
Paris. Opera pianos |
| 1839 |
A=448 |
Hamburg. Opera pitch |
| 1845 |
A=446.6 |
Milan, Italy |
| 1852 |
A=452.5 |
London. Pitch of the Philharmonic Orchestra |
| 1859 |
A=435 |
Karlsruhe, Germany. Pitch at the German Opera |
| 1859 |
A=435.4 |
Paris. The French Commission Diapason Normal |
| 1859 |
A=446 |
Budapest. Opera |
| 1859 |
A=449.8 |
Prague. Pitch of the Opera Orchestra |
| 1859 |
A=456.1 |
Vienna. Old Viennese Orchestra pitch |
| 1862 |
A=445 |
Vienna. Piano pitch |
| 1862 |
A=454 |
Also used at Vienna |
| 1874 |
A=454.7 |
London. 1876 A=446.7 London. Concert pitch |
| 1877 |
A=449.9 |
London. Standard fork used by Collard Piano
Co |
| 1878 |
A=451.9 |
London. British Army regulation pitch |
| 1879 |
A=449.7 |
London. Pitch used at Covent Garden Opera |
| 1879 |
A=454.7 |
London. Tuning fork used by Steinway &
Sons |
| 1879 |
A=457.2 |
New York. Tuning fork used by Steinway &
Sons |
| 1880 |
A=444.9 |
London. Her Majesty's Opera |
| 1880 |
A=446.2 |
London. Tuning fork used by John Broadwood
and Co. |
| 1937 |
A=440 |
London. An International Conference standard
pitch |
| 1987 |
A=440 |
Toronto. Confirmed as the International Standard |