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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
The developer editions had a hole, but no membrane - but I don't believe any of the watches I sent out had no hole (only the early ones I used for development here).
But yes, there's the aerial right along the top. Honestly, I'd say a hole in the bottom might be more sensible if you're doing it after assembly :)