Originally i thought this was just a dual stereo fader and in a way it is, however it turns out this is a very very rare Alps K fader.
I believe that one
side is a log .one is Lin, I believe this was used with automation
so one side a computer would know where the sliderr was and could move or
record its position which would be more difficult with the audio log
side
Used Main output fader, all have been cleaned but we warrant them to be fully functional
Used on the M-3700 and I guess many other units with automation