Assembly goes relatively quickly, granted everything fits properly and you know where it goes. Slowdowns occur when you discover an issue, create an issue, or go to oiling. Above is the gear train of the watch, each of those pivots on the end rest in tiny holes inside a ruby. When you oil the jewels it's ensuring these interacting parts run with little friction.

Remember in the earlier blog post when I had to burnish a pivot? This is when I get to see if I failed or succeeded. If I did a poor job, it wont fit or run properly and I'd need to order a new wheel.