The upcoming Sony C503X showed on the AnTuTu benchmark database. In terms of specifications, there is not much to know except that the processor is working at 1.7 GHz with unknown numbers of cores, but according to rumours it should be dual-core due to mid-range device.
Codenamed HuaShan, comes with Android 4.1.1 Jelly Bean system. On AnTuTu benchmarks, it scored 16133. For the mid-range device, this should be quite a good score. Previously noticed, it will have 5-megapixel camera and f/2.4 lens with rumoured CES or MWC appearance.