1x12 Rotary Switch (18 teeth)
rotary switch
"programmable" from 2 steps to 6 steps (with stop ring... left one on the picture)
18 teeth shaft... for SIFAM knobs with 18 teen shaft
for SSL compressor
for ATTACK, RATIO, RELEASE
BBM (break before make version) which means: when switching from Pin1 to Pin 2 the contact will opened for a short time. That the standard configuration and most often used.