Above two images are reportedly of Lumia 1330 / Lumia 1335 back cover and are leaked by the same person who has leaked below images of the Lumia 1330 back. The second image has a Lumia 535 placed in the cover and show how bigger Lumia 1330 will be in real-life. Also, note the Microsoft branding.
We exclusively reported via our sources that Lumia 1330 (RM-1062) will pack a 14 MP rear camera and a 5 MP FFC. And, we presented some evidence in form of a screenshot from GFXBench listing of RM-1062.
Thanks Aikon for the tip. Cheers!!