Show us some odd ignitions from the past

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This one I've never seen- what's the story? Rudimentary CD?
Nope, that's a set of Capaci-Points. First pair I've seen an actual photo of; here are pics of where I know this from. This 1977 book was in my high school library—it's a low-level car maintenance manual stuffed with promotional sorta-ads for relevant products of that time.

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