| Harris | |||||
| Harris Typewriter Co., Fond du Lac | |||||
| Since 1914: Rex Typwriter Co., Fond du Lac | |||||
| Since 1921. Demountable Typewriter | |||||
| Models and s/n | Y | M | D | Remarks | Ref. |
| Standard manual | |||||
| Harris visible | |||||
| 1911 | 3 key-row machine, 28 keys | 4 | |||
| Rex, Rex Visible, Rex Demountable Models | |||||
| starting 1914 | some Models sold by Sears | 4 | |||
| up to Model 10 | |||||
| 1921 | 32 keys, some Machines already sold as "Demountable" | 4 | |||
| Demountable Model 1 | |||||
| 1921 | Started in 1921, 4 key-row | 13 | |||
| Demountable Model 2 | |||||
| up to 140000 | 1929 | Started in 1925, since 1926 different carriage sizes | 7,13 | ||
| 150000 | 1931 | 13 | |||
| 155000 | 1932 | 13 | |||
| 156000 | 1934 | 13 | |||
| Portables | |||||
| National No. 2 | |||||
| 1917 | The"National" was developed and built in the Harris factory, 3 key-rows, 28 keys, National No. 1 was never sold | 4 | |||
| Model 2 was exported from Switzerland with the brandname "Express, later on sold in the U.S. as Portex and Crown, Nickel-models were available as well | |||||
| National No. 3 | |||||
| 1919 | 4 | ||||
| National No. 5 | |||||
| 1920 | First 3 key-row portable with a shift key at each side, steel frame | 4 |