It's an Apple Adjustable Keyboard, seems to be in a good condition after cleaning.
Apperently only the long ADB cable is included, not the short one from keyboard to numpad... :/
It is a normal ADB cable though isn't it?
Well and the hand wrists are also not included.
Not the actual one i bought, but it's the same.
![Smile :)](./images/smilies/icon_e_smile.gif)