Does is have the original face with the makers name on it? There are a lot of books about now that cover clock makers in specific areas, you might have to research the maker a little to see if you can find any other pictures of his work. Depending on how old your clock is might also mean that the movement was a one off. You should be able to find a movement to go in there even if it is not the original one as the chances of finding the original movement may be very slim.