This is my GM-100 of
the G-Mix series. I believe this series is never released outside Japan,
since this is the first I saw for sale. It's much smaller than the
pictures might suggest. It's just regular G-Shock size. It has an
animated dancing animation in the upper screen. On the bottom of this
page you'll find an animated GIF to make an impression how it looks
like. It's also the loudest G-Shock I ever heard. I had it in a box in
my bedroom for a while. For two nights I was woken up every hour by it's
(polyphone) hourly signal. There are several polyphone melody alarms on
this model. It's a nice gadget, but I believe also a good battery
drainer.
This one doesn't have the original watchband unfortunately. The original
is a double band with a leather upper part.