I went by a photographic lighting store this morning, and tried some different approaches on the Siffert Autavia that I am wearing today. Here is a quick snap-shot (no tripod, no table, no diffusion, etc. -- just hold the camera in one hand and the watch in the other, and shoot) under a professional flourescent fixture. It's not as pretty as the shots that some of our "professionals" are getting, but I thought that it was good for a quick snap-shot.
I've been using $20 flourescent lights from Home Depot, and others may be using inexpensive light boxes . . . this flourescent fixture costs around $1200. Oh, well . . . fun to try it, anyway.