Run like a Swiss watch
Run like a Swiss watch (English) — When a plan, or action, especially a complicated one works out well and achieves the desired results. In any enterprise (business or personal) this is the goal to have the best service or product. Equipment that is running at maximum efficiency can be said to run like a Swiss watch.
The Swiss are well known for their intricacies and precision in creating delicate, yet well crafted time pieces.