Here is a new image for your 3x3x3 picture cube database (I hope the quality is good enough). The puzzle is called Quble and was manufactured by Geospace.
Unfortunately I don't have a Quble myself, so all I know is that it was shipped with a timer and a booklet with instructions for a variety of word games. The number shown by the consonant letters are used for scoring the words.
As soon as I've got the pictures of all faces you will find a 3D version of this puzzle here: