Serienummers van Keilwerth Saxofoons
| Jaar | Serienummer |
| 1925 | 0-800 |
| 1947 | 20,000 |
| 1953 | 23,000 |
| 1958 | 28,000 |
| 1960 | 38,000 |
| 1962 | 43,000 |
| 1964 | 49,000 |
| 1966 | 55,000 |
| 1971 | 69,000 |
| 1978 | 79,000 |
| 1986 | 91,000 |
| 1993 | 99,100 |
| 1998 | 109,000 |
| Jaar | Serienummer |
| 1925 | 0-800 |
| 1947 | 20,000 |
| 1953 | 23,000 |
| 1958 | 28,000 |
| 1960 | 38,000 |
| 1962 | 43,000 |
| 1964 | 49,000 |
| 1966 | 55,000 |
| 1971 | 69,000 |
| 1978 | 79,000 |
| 1986 | 91,000 |
| 1993 | 99,100 |
| 1998 | 109,000 |