Please help me identify this splindle tooling system
a)
This spindle is a Colombo RV90.2 SB. Spindle taper look like MT2 but it is a blind hole. Nut have a threaded hole at the bottom.
Attachment 450162
Attachment 450164
b)
What it the use of that threaded washer that I have unscrew ? Does it mean that the MT2 socket can be removed ? I can't find an exploded part list of that spindle. Someone can help ?
Attachment 450166