Editing Cherry M7 (section)

==Part numbers==
Current evidence (such as the [[Cherry catalogues|1979 Cherry catalogue]] and the [[Computer service manual findings|ADDS CONSUL 980 service manual]]) suggests that the series was broadly divided up as follows:

*M4n-nnnn: lighted
*M5n-nnnn: space bar
*M6n-nnnn: other keys including the shift–shift lock mechanism

Once the series was consolidated under M7, it becomes a little less clear:

*M71-nnnn: lighted
*M73/M74-nnnn: typical keys
*M75/M76/M77/M78: a complex design that allows up to four poles and/or illumination

Standard M61 keys moved to M73 during this process; the distinction between M73 and M74 is not yet clear, nor of the distinctions within M75, M76, M77 and M78: these two groupings each share one brief set of diagrams within the 1982 Cherry catalogue.

The M51-0131 switch depicted below appears to be clear exception to this, as it should fall within M61. However, M51-0182 is another non-space bar M51 switch. Study of Cherry part numbers is still ongoing.

===Part number equivalence===
The following are confirmed part number replacements:

{| class="wikitable"
! Old part number !! New part number !! Type
|-
| M61-0120 || M73-0120 || Momentary, 70 cN, tee mount
|-
| M51-0182 || M73-0110 || Momentary, 70 cN, 10°, bar mount
|}