Is there any list of ultra-cheap quartz modules used in ultra-cheap watches?

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So I bought a bunch of watches for $1.79 on sale from AliExpress recently (I do have a Berny and Rdnae watch respectively, and except for the ultra-long Rdanae strap pretty impressed so far), and the one I just popped open, a Cartier Tank homage, if this thing is even good enough to be called an homage, has a fairly low tech looking quartz module (there are large solder balls) that just says "Z206." Any info on what these random quartz modules actually are, where they came from, if they're crappy clones of something? Thanks.

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Posted: 10 months ago
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