Although the official image (the full update in practice) has already been released by Google for takju version of the Samsung Galaxy Nexus, version yakju, or the international one and then allocated to European market, it is still "stuck" to the Android version 4.1 .2. Although some devices have been officially updated to 4.2 distributions for the first test at the time or you can force the update on takju and yakju device or otherwise you need to wait for the official release by Google.
In practice, there are still no specific dates for the international release of the update Android 4.2 for Galaxy Nexus and optimization work continues. We have to wait!
Download Factory Image takju Galaxy Nexus Android 4.2