Editing Four-tab clone (section)

===Mould numbering===
Mould numbering examination is a first step that allows for the recognition of certain switches. In particular, NW:A## numbering appears to always indicate Taiwan Tai-Hao APC series switches. N:A## and N:## typically indicates Xiang Min's non-LED switches.

<gallery widths=250 heights=187>
File:Four-tab clone -- APC.jpg                       | NW:A## — [[Taiwan Tai-Hao APC series]]
File:Four-tab clone -- Xiang Min (AN).jpg            | N:A## — [[Xiang Min KSB series]]
File:Filco Zero KSB-C switches showing numbering.jpg | N:## — [[Xiang Min KSB series]]
</gallery>

Identification of specific switches requires that the switch be opened and the internals examined; care should be taken as the contacts are fragile and supported chiefly by the upper shell, and Alps clone switches are very difficult to reassemble while still soldered into the keyboard.