I am relatively new to the cham world but learn so much when others ask questions! Your description does sound like a Panther but it's "home" doesn't fit. Just curious...how do you know where it is from but don't know the species? Did you collect it from the wild???? You need to know what it is in order to care for it properly.
Jackson's are from Kenya and the females don't have horns but some can have protrusions. Here is a link on AdCham of Panther morph's and you will notice most have the light stripe you mention. The page takes a bit to load depending on your computer. Hope this helps and let us know what you find out.