Alps SKCMAE

Background

I have been hunting and looking for documentation to better document the SKCM/SKCL series of switches from Alps Electric Co. 

I know that other companies have used Alps switches before and Roland is one good example. One example from Roland is the MC-500 Mk II with SKCMAF(Tactile Cream Undamped). 

Discovery

I found another model of Roland synth that contained a switch which was undocumented, SKCMAE. This was interesting as the Roland synth was introduced in 1985 and continued to 1986. I purchased the Roland SBX-10 synth in hopes that community would be able to gain additional context to the history of the Alps SKCM/SKCL switch series. Alps SKCMAE is known by the community as Alps SKCM Brown. Below is the manual for the synth showing the SKCM name and images supporting said information.