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This is one I think you'd be better off emailing Chris (boardsort) directly and link this topic so you don't have to attach photos.
I don't think they'd be backplane (I'm leaning low peripheral myself); one doesn't even have any pins and the rest have different amounts of pins. And two of them; the gold fingers don't look like they have as much plating (could be the lighting).
Anyways; email Chris.
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Here to learn more so I can recycle more
My grades are my own opinion and not an official grade from Boardsort
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