can anyone identify these relays from a 1969 280SE? thanks.

000-542-93-19

000-545-08-32

Emission control rpm BOXES for controlling vacuum timing advance & retard.

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can you tell me which one does what? it seems p/o or his garage by-passed factory ign. primary wiring. i see another set of wires & condensor hanging below dist. can this system function properly with only mechanical vacuum advance? thanks.