My wife is a photographer and buys glossy magazines as a part of getting inspired, so I picked up a Vanity Fair special on watch movements a few days ago and thumbed through it. I was struck by the fact that the shots of watches weren't accompanied by prices so I typed "tourbillon" into google. I got 5 returns in the "shopping" banner, with prices ranging from £380,000 to $22.
One of the things I learned from the Vanity Fair article, which is pretty obvious, is that the patents on automatic watch movements have all expired. New designs are not, by in large, technical innovations, the patents on them protect novel arrangements with novel aesthetic characteristics. Therefore if you have a little cnc machine or a 3d printer you can make a movement for pennies and sell with the comfort of IP protection. The gold and gems on a watch are worth ~£10k, leaving ~£360k as margin.
Staggering.