Just thought I'd post some quick dirty pics of this module, not sure how common it is, it's just a Microsonic, but it's the only one of it's type I've ever seen, and I've had 100's of modules go through my hands over the years. It has several button configuration options...
I have a couple here...commonly found in the Armitron pocketwatch LED with a little metal clip that bridges over to the contact and gives spring to the button. which also releases the cover.
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