my late wife's grandfather left a few watches for her and now I am wondering if they should be serviced. The Voumard 2000 is running but I keep remembering the old saying, "if it ain't broke, don't fix it". I have not installed a battery in the Benrus so I don't know if it will run. Also, if I do open up the Voumard case, is there any precautions with the unusual winding steam I should know about?