Darth Vader's chestplate and belt - quite bad when compared with Medicom's.
"Help me take this mask off." Stage 1: Removal of the helmet revealed Vader's mask with helmet attachment clamps and magnetic latch on top and at the sides as well as body heat regulators above the visual enhancement sensors and the air intake/output vents.
"Let me look on you with my own eyes." Stage 2 removal revealed the lower jaw and neck support durasteel shell which housed the voice processor and nutrient feed tube at the front as well as multiple power cells and power distributor at the back. Anakin's (Sebastian Shaw played Darth Vader unmasked) disfigured face as seen in Episode VI when Luke unmasks him towards the end. "Now go, my son..."