When we put our mitts on the official BlackBerry Q10 design in January, it carried a "glass weave" back that was meant to convey a premium feel, not to mention give Bold 9900 series owners a sense of continuity. The crew at Genk have snagged a pre-production example that teases what could have been. Their black device has the same grippy, rubberized back as the Z10, suggesting that BlackBerry was at least experimenting with using the same extra-practical (if less refined) material up until the unveiling. What else do we learn? While we wouldn't want to judge the user experience from a prototype, the look reminds us that there should be a 2,100mAh battery inside -- a big boost over the Z10's 1,800mAh pack, especially when there's a smaller screen involved. If only we didn't have to wait until later in spring to try the finished product.