See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
D-Link DSL-2640U rev C4
Additional models include..
The FCC EUT's photos are not particularly good - the SoC (which would seem to be a BCM63281) is covered w/ a heatsink and the resolution is low. A MAC label w/ a 1C:BD:B9 (D-Link International) OUI is affixed to the board, but it is not known if it is used.
A FC:75:16 (D-Link International) OUI may also be used by this device