When Apple introduced the Apple Watch they didn’t really mention that they upgraded it slightly mid cycle and there seems to be a lot of confusion between generation 1 and series 1.
On the back of your watch if it says 7000 series this is a first generation Apple Watch also known as series 0 sometimes referred to as the beta watch.
The rest of the watch’s say series 1, 2 or 3. The 7000 series will not get WatchOS 5 all other models will as long as you have iOS 12 on your watch. Sometimes you may need to restart both your iPhone and watch before getting the update prompt.
We hope you find this guide useful.