Microsoft Mobile to replace Nokia X with new low-end Lumia range (picture)

We have earlier reported that a new set of low-end devices have passed through the FCC, with model numbers like RM-1068, RM-1070, RM-1071, RM-1032, RM-1034.
We wondered where these devices would slot into the Windows Phone range, and now some more information as emerged.
CNBeta have posted the above picture of what is purported to be the Lumia 330.  The device will have a WVGA screen, hardware buttons and around 11-12 mm thick.
Separately NokiaPowerUser have posted about the Lumia 435, which is said to have a 4 inch WVGA screen, Snapdragon 200 processor and 5 megapixel rear camera.
With the devices confirmed to be existing via FCC, and the Lumia 535 just being released recently, it makes sense that these devices would slot below them, making for a very deep low end range.  Given the position of the handsets we suspect also that they will sell for much less than $100, which will hopefully stimulate Windows Phone volume sales.
Thanks GSMDome for the tip