| Secor | |||||
| Produced in the Williams factory in Derby, U.S.A., by J.B. Secor | |||||
| later: Secor Typewriter Co., Derby U.S.A. | |||||
| Models and s/n | Y | M | D | Remarks | Ref. |
| "Secor" | |||||
| 1906-1913 | Four rows keyboard | 4,13 | |||
| Model 2 and 3 | |||||
| since 1908 | 4,13 | ||||
| Only 7000 Secor machines were produced, the factory building was sold in 1916, the production machines patents were offered in newspapers in 1924 | 4 |