Editing Mitsumi standard mechanical (section)

===Type 1===
Type 1 switches, the first generation, have a tall cruciform [[slider]] and an upper shell with a matching guide shaft. There are no standoff nubs on the base of the switch. All known Type 1 switches are linear, though some such as in the TONO Theta-7070 include late actuation tactile "linears" due to a stiff sensing leaf.

The latching variety has been found in the [[Commodore 64C]], introduced in 1986, while the original Commodore 64 keyboard used a curious switch with PCB protrusions for "legs". There is a suggestion here that the latching switch was introduced after 1982 (when the Commodore 64 was introduced) and by 1986.

The late linear variety can be found on old boards such as the TONO Theta-7070. It possesses a white cap, cruciform mount, and a sense leaf stiff enough to present tactility more than halfway down the keystroke. 

From the same board comes the yellow cap variant which is a light version of the linear switch. Any tactility from this sense leaf is negligible and it appears to be completely linear.