A company called Pacific Royal was selling a computer called the "Jetbook CD5", and I can only assume that their "Jetbook CD5" is Jetta's CD5, which DOES exist, for sure. It's referenced on their website. If this is the one Jetta sold, then it wasn't made in-house by Jetta. The image I have is pretty terrible, but it appears to be a rebranded MiTAC 5021.
Here's all the info I have on it at the moment:
Index < Laptop Portal < Jetta < Jetbook CD5