Most fashion labels are renown for branding, especially watches.

So as mentioned without JAG on the case it's possible it's a copy.

At first I thought JAG band put on the watch but the design follows from case to band.

The cheaper watches usually have a Japanese movement known as Myota, it's base model is cheap and all plastic.

This movement is Chinese, even worse.

On eBay I think you may sell it for 30-40 providing you find someone liking the design.