The Samsung Galaxy J7 (2017) is already official but a bunch of leaked images show a variant of the phone for the Chinese market, sporting a dual camera.
Samsung is yet to announce its first dual camera smartphone and so far we were expecting the Galaxy C10 to be it.
The leaked images belong to a Galaxy J7 (2017) with the model number SM-J7310 but there isn't anything in the leak concerning specs. If the Galaxy J7 (2017) for China uses the same internals as the international model then it should have a 5.5" 1080p Super AMOLED, an Exynos 7870 Octa, 3GB of RAM and a fingerprint reader on the front.
Keep in mind that this device could prove nothing more than an early prototype that failed to make it to production.