Or often thousands.... Nowadays we have accurate time on our phones and computers, and smart watches might still cost hundreds, but they deliver essentiallly the same precision of time. This wasn't always the case, and the 
featured here shows the restoration of a watch from start to finish. The talented being performing this feat does rightly claim he needed the services of around 53000 (British) pounds worth of machinery to properly restore it, but fortunately he knows a few people who happen to own and operate such machines.
The video shows a lot about how to properly handle mechanical watches when restoring them, which is fascinating to watch...