Part Number Needed for Case Tube on Omega 166.010 Case

Hi can someone share the correct part number for an Omega 166.010 case tube? I understand the correct crown part number is 42055ST but have not been able to find the tube part number. Someone told me 090ST7078 but that seems to correspond to caliber 1022 and the movement on this one is caliber 564.


Thanks!

Francisco