Editing Cherry M7 (section)

===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>