Hi I have a total of 9 different styles of this watch. Most of them start with ZT
and say solsuno on the front.
Yet one of them says Zeon on the face but it doesn't start with ZT but ZR.
Also my silver with all silver face says ZEON TECH on the back but starts NIL .
Three of them have screw on backs. The others are push on's. So don't think it's as easy as that.
I asked a guy who seemed to know quite a bit about these and he said that the none ZT numbers
where earlier models, and worth more, but I haven't found that works. It's a bit of an unknown I think.
One day when I get around to it I'll try to take some better pic's of them all (inc the one that's on it's way)
and post them ..
Pete