Might it be one of these..?
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OMG - spent hours trawing through the casio site myself & that was the closest I could find too!
It does look really close but her one seems to have a distinct join between the watch face & the strap. I did wonder if the top of the grey side bars may just be obscured by part of the watch at that angle. Looks like that could happen with the Casio in your picture.
It somehow reminds me of maybe a Polar heart rate monitor watch but that seems a bit 'out there' for Stargate. AFAIK, they've stuck pretty exclusively to G-Shock & Suunto. Ahh well, it's not a biggie - just frustrating in the information age, not to be able to find it. o| ;-)
No idea (yet) but it looks good on her!
Yeh, WHY is it that girls look sexy with over chunky outdoor watches?