A sample of the new Sony Xperia appeared on Indonesian Postel website. Form No. C6903 Xperia suggests that this is a high-end device, the Xperia Z (C660X), and the last digit '3 'suggestion that it supports LTE frequency band in Europe.
Previously it was announced that a number of C6907 samples were used for internal Z Xperia Tablet wifi version, so we are not sure if this number has been reused to another device or whether related to the Xperia LTE Tablet SKU Z.
If we are looking for another device, then it's a good chance there will be for the upcoming launch of Sony products, can also be Xperia Ultra Z ('Togari) or Honami. We will bring you more information when we
Source: Xperia Blog.