Editing Micro Switch SW Series (section)

==History==
According to Micro Switch, they introduced the "world's first solid-state keyboard" in 1968.<ref name="history" /> A patent was filed for the series in November 1969.

Based on the keyboard examples listed below, the known production range for SW series keyboards is 1970–1980. A similar list of examples isn't available for [[Micro Switch SD Series]] but it is likely that SW series was superseded by SD series somewhere around 1980.

SW series appears to have been followed by [[Micro Switch SN Series]]; comparing the [[:File:Micro Switch SN+SD series.pdf|Micro Switch SN/SD Series]] catalogue page with the switches sold by STRONIC in France appears to show three separate designs: SW, SN as depicted by Micro Switch, and SN as sold. One consistent difference between SW and SN is that the bottom of the shell in SN is not stepped as it is with SW; the retaining loop system is a different design and the shell sides are vertical at the base.