Broke or Watch Experts of the OT - Watch Repair

I'd like to get my wife's old watch cleaned and back to new. Or at least as new as can be. Any idea how much it might cost? From what I can gather, the mechanics are fine (just needs a battery), but there's a diamond or two missing. They're very small diamonds, so I'm thinking/hoping it won't be too costly. Any idea what goes into this and what it might cost?

For all the clever OTer's, I've already ruled out three fifty, unfortunately.