Alternator voltage regulator teardown and analysis

So far just the photo of the top.
Looks like two smaller solid state resistors and three wire wound not called out in the illustration?
And then cap as well is not called out.
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No other photos of the internals else in that master tech booklet.
Rereading the booklet and Kit's description, it sounds like the supressor diode reduces spikes but the current regulation is on/off (unlike the earlier regulator with three positions; on, reduced current, off)