Brua Keefer purchased the Henry Distin Company in 1909. This serial number list is based on collected information from about 400 instruments compiled in 2020.
If you note any discrepancies, or have additional information concerning this company, please contact us here at Horn-u-copia.
For more information, go to the Detailed Record of Keefer Instruments. This page details the references used to compose this serial list.
| Year | SN# | SN# Keefer/Williams model | Notes |
|---|---|---|---|
| 1909 | 0 | Keefer starts 3/1 | |
| 1910 | 5000 | reset to 5000 | |
| 1911 | 5600 | ||
| 1912 | 6200 | ||
| 1913 | 6800 | ||
| 1914 | 7400 | ||
| 1915 | 9000 | start of union label (#s 8100-9000 skipped) | |
| 1916 | 9600 | ||
| 1917 | 10200 | start of USQMC | |
| 1918 | 10600 | last year for union | |
| 1919 | 11000 | ||
| 1920 | 11330 | ||
| 1921 | 11670 | ||
| 1922 | 12000 | ||
| 1923 | 12330 | ||
| 1924 | 12670 | 10000 | (K-W Trumpets start 10000) |
| 1925 | 13000 | 10020 | Oct 1925 patent tuning slide starts 13350 for trumpets |
| 1926 | 13400 | 10080 | |
| 1927 | 13700 | 24000 | Serials merged and reset to 24000 following Brua Sr's death |
| 1928 | 24400 | ||
| 1929 | 24700 | ||
| 1930 | 25000 | ||
| 1931 | 25080 | ||
| 1932 | 25160 | ||
| 1933 | 25240 | ||
| 1934 | 25320 | ||
| 1935 | 25400 | ||
| 1936 | 25460 | ||
| 1937 | 25520 | ||
| 1938 | 25580 | ||
| 1939 | 25640 | ||
| 1940 | 25700 | ||
| 1941 | regular production ends |