See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
Google indicates this is the Kindle Voyage, which seems to have already been released in Japan (see amazon.co.jp)
Two FCC filings note models of NM460GZ - one under the grantee code of Romano LLC (AKD) and another under that of Cymbidilum LLC (A4Y).
This device was under short-term confidentiality, but that expired 02/02/2015.