Darklands Puzzle #13

The path is blocked by a grim iron door. Carved overhead are the words:
THE FACES SPEAK ONLY TRUTH.
PUSH GYMER'S FACE TO OPEN THE DOOR.
Embossed on the door are four faces, a gold dwarf, a gold kobold, a silver gnome, and a silver ogre. The faces speak.
Gold Dwarf: "Albech is made of gold."
Gold Kobold: "Hoder is made of silver."
Silver Gnome: "The kobold is neither Gymer nor Albech."
Silver Ogre: "I am not Hoder."
Which is Gymer? A false choice may (will. ed.) release a trap! You think carefully, then press...
...the dwarf.
...the kobold.
...the gnome.
...the ogre.

(Source: Darklands cluebook by MicroProse Software)

Four faces and three names. The Gold Kobold tells us that Hoder is made of Silver and the Silver Ogre denies being Hoder. Because no dirty liars are present for a change, this means that the Silver Gnome is Hoder. This leaves only the names Albech and Gymer behind. Because the Gold Kobold is neither Gymer nor Albech, as the Silver Gnome says, then Albech must be the Gold Dwarf, as he has stated that Albech is made of gold. Now only Gymer remains to be assigned. Because it has been established that the Gold Kobold is neither Gymer nor Albech then the Gold Kobold's name is unknown and the only possible candidate is the Silver Ogre.