I recently had the good fortune to discover Manhattan Time Services. I did so, in of all places, the white pages – though it was courtesy of Google as well. I called, and their customer point man, gave me a quick run through of their process. I explained to him that my watch is not a noted brand; Jacob said he didn’t think it would be a problem. I brought it in the following day, met Jacob, and he again went through the processes that they put a watch through; battery; internal cleaning, some other things I can’t even recall.