Editing Cherry M7 (section)

==Variants==
===M61-0100===
The depicted switches were sourced from Electronic Surplus (SKU 2074) with no information about their age or origin known. Based on their characteristics of standard weight, 1 form A momentary with a bar mount, this would make them M61-0100. If they were produced in the 1980s onwards, the part number would instead have been M73-0100.

<gallery widths=250 heights=187>
File:Cherry M6 assorted.jpg       | Assorted switches
File:Cherry M6.jpg                | Top
File:Cherry M6 rear.jpg           | Rear view
File:Cherry M6 rear 2.jpg         | Angled rear view
File:Cherry M6 -- internals 1.jpg | Internals of the switch
File:Cherry M6 -- internals 2.jpg | Fully disassembled
</gallery>

===M61-0120===
This appears to be the standard keyboard switch. According to the [[computer service manual findings|service manual]], it was the primary switch in the ADDS CONSUL 980. The switch depicted below is from a CDC IST II ca. 1981. Standard weight, tee mount, 0° stem corresponds to part M61-0120 (1979) and M73-0120 (1982) so the depicted switch could be either.

Notable design characteristics include:

*"CHERRY" legend inverted compared to M61-0100 above
*The slider is only capable of operating a single pair of contacts (SPST instead of the typical DPST-ready design)
*Distinct plate retention clips instead of raised areas of plastic
*The ridge around the slider aperture is set off by a clear gap

Also of note is the use of gold-coloured and copper-coloured materials for the stationary and movable contacts respectively, instead of the typical grey metals.

<gallery widths=250 heights=187>
File:Cherry M61-0120 (CDC) -- top.jpg               | Top
File:Cherry M61-0120 (CDC) -- front.jpg             | Front
File:Cherry M61-0120 (CDC) -- rear.jpg              | Rear
File:Cherry M61-0120 (CDC) -- components.jpg        | Components
File:Cherry M61-0120 (CDC) -- slider.jpg            | SPST-only slider
File:Cherry M61-0120 (CDC) -- contacts.jpg          | Terminals/contacts
File:Cherry M61-0120 (CDC) -- crosspoint prisms.jpg | Crosspoint prisms
</gallery>

===Defaced tee mount===
The following switch is from an unidentified batch sold by RS; the switches have the RS logo printed onto the side, and the Cherry branding poorly machined off. Compared to all other examples discovered to date, the chief difference is holes cut in the base of the switch. They are otherwise virtually identical to normal Cherry switches from around 1981.

<gallery widths=250 heights=187>
File:RS Cherry -- switch with branding.jpg       | Branding
File:RS Cherry -- mount detail.jpg               | Mount detail
File:RS Cherry -- branding removal detail.jpg    | Branding removal
File:RS Cherry -- contacts in base.jpg           | Contacts
File:RS Cherry -- disassembled, top views.jpg    | Disassembled, top views
File:RS Cherry -- disassembled, bottom views.jpg | Disassembled, bottom views
</gallery>

====Comparison====
The following is a comparison between the bar mount switch depicted above, and the RS defaced switch (right):

<gallery widths=250 heights=187>
File:RS Cherry -- shell comparison.jpg           | Shell comparison
File:RS Cherry -- base comparison.jpg            | Base comparison
File:RS Cherry -- slider comparison.jpg          | Slider comparison (DPST vs SPST)
File:RS Cherry -- internals comparison.jpg       | Internals comparison: the slider is the only difference
</gallery>

===M51-0131===
The depicted switches appear to be from a batch of M51-0131 switches manufactured by Cherry for Burroughs. However, the corresponding Cherry design drawing for M51-0129/0131 shows tee mount. The use of M51 instead of M61 for a standard weight momentary switch is a mystery. Differences between the examples in the 1973 and 1974 catalogues and the 1979 catalogue suggests that the numbering scheme may have changed more than once. For example, 0°/10° shift and shift lock in 1973 and 1974 were M61‐0300/310 and M61‐0500/510 respectively, but M61-0025/0026 and M61-0027/0028 in 1979.

Note that the top of the switch is marked with the numerals 1 to 4, possibly corresponding to the four terminal positions (of which only two are in use here).

<gallery widths=250 heights=187>
File:Cherry M5 -- front view.jpg       | Front view
File:Cherry M5 -- rear view.jpg        | Rear view
File:Cherry M5 -- opened 1.jpg         | Opened, with components still in line
File:Cherry M5 -- opened 2.jpg         | Opened
File:Cherry M5 -- opened 3.jpg         | Opened
File:Cherry M5 -- slider operation.jpg | Slider operation
File:Cherry M5 -- disassembled.jpg     | Fully disassembled
</gallery>

The box of switches manufactured for Burroughs; these switches are reported to be identical to the switches depicted above:<ref name="DT_Triumph" />

[[File:Cherry_M51-0131_005364.jpg|724px|Cherry M51-0131 shipping box, from a delivery originally intended for [[Burroughs|Burroughs Corporation]]; no date indicated.]]

====Comparison====
<gallery widths=250 heights=187>
File:Cherry M7 comparison 1.jpg | Contact assemblies, rear view
File:Cherry M7 comparison 2.jpg | Contact assemblies, front view
File:Cherry M7 comparison 3.jpg | Bases, inside (top) view
File:Cherry M7 comparison 4.jpg | Bases, outside (bottom) view
</gallery>

===New logo===
The following switch is from Sandy's Sagem keyboard, of unknown year.<ref name="Sandy-Sagem-G2" />

<gallery widths=250 heights=187>
File:Cherry M7 G2 angled stem.jpg              | Angled, cruciform slider
File:Cherry M7 G2 angled stem -- top view.jpg  | Top view, showing new logo and moulding
File:Cherry M7 G2 angled stem -- side view.jpg | Side view, showing new plate retention clips
File:Cherry M7 G2 angled stem -- base.jpg      | Identical base to first generation
File:Cherry M7 G2 angled stem -- opened.jpg    | Switch opened up
File:Cherry M7 G2 angled stem -- slider.jpg    | Slider
File:Cherry M7 G2 angled stem -- contacts.jpg  | Identical contacts and base to first generation
File:Cherry M7 G2 angled stem vs MX Brown.jpg  | Stem comparison with [[Cherry MX Brown]]
</gallery>