when browsing through my favourite hardware shop, I stumbled upon a Teac DV-W520GM.
20x DVD+R, DVD-R
8x DVD-R Dual layer
8x DVD+R Double layer
48x CD-R, 32x CD-RW
Note, DVD-RAM is not mentioned, so I suspect, this is disabled by firmware.
Since former Teac drives were recycled Liteons, I guess, this might be a Liteon also. Unfortunately, the pictures published show a DV-W516, so it can't be used to guess the real menufacturer.
Anyone with an idea (apart from "buy and check")?