It is very easy to get stung on e-bay, especially with the wild and wonderful stories attached, I found this in my Grandad's loft or it was in a box from a storage sale and I don't really know much about them.
I bought a fake G-Shock in error the other week. It was only when I examined it closely I smelt a rat. Google images was a great place to start and images lifted clearly helped my case.
First two images are the watch that I bought:
The next two are borrowed images of the real thing:
The 24 hour and power save indicator are both wrong as is the spacing of the markers between the hour and minute numbers.
Luckily the seller and e-bay accepted my proof and I returned the Watch for a full refund. I'm sure the Watch will be relisted at some point.