Since when did Nixon make headphones?
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They're probably OEM'd, but then again, I doubt their watches are OEM'd, so maybe not. But then again, their specialty is watches, so of course their watches aren't OEM'd, so it's still possible that everything else they sell (clothes, bags, cufflinks, etc.) is. But I certainly don't recognize them, so if anyone has any theories on the subject -- much less heard them -- please speak up.
No, I'm not getting them -- way too expensive to try just for whimsy.