I thought I'd quickly share this one, not a G but a lovely old Casio AD-717.
I can't find hardly any info about this one, although I have had one a few years ago from eBay that I bought non working and sent to Casio UK, who said the module was shot electronically so couldn't fix it, and I never asked them to send it back as I didn't see the point.
I think these were touted as diver's watches and seem to recall seeing a Casio ad with a scuba diver wearing it underwater?
I also like it because of the unusual left hand crown, rather than right handed. Not sure if these have a screw down crown?
I did a Best Offer at €60, (£54), and got it accepted straight away.
Apparently the right hand button doesn't work, so hopefully it's either literally stuck or the module is caught on it.
I just need a nice brown leather strap as I think that's what these originally had anyway and I can just swap the buckle onto it.
The bezel has light scratches, but as normal I think these have been picked up more by the camera than the eye can see, and the crystal looks pretty much unmarked.
So here she is in a few photos by the seller:
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