Haven't seen this posted yet and thought it might be of interest to some (probably more from a horological standpoint than a purchasing standpoint). Grand Seiko released what I believe is their first tourbillon, in this case coupled with a constant force mechanism, a couple of days ago. The mechanics of the whole thing are a bit beyond my comprehension, but greater minds may appreciate it.

https://www.ablogtowatch.com/grand-s...rbillon-watch/

The video is certainly worth a watch: