Not in your specific area but I've used The Watch Pocket Jewelers in the Woodmoor Shopping Center at 4 corners. Matt Stohlman is a knowledgeable guy and has done some good work for us over the years. Here is the link:

http://thewatchpocketjewelers.com/

There's a good one in Kensington on Armory Ave. - I haven't used them in a while, though.

I've tried Ecker's with disappointing results, so I'm looking for something else. Thanks.