I love mechanical watches; beautiful, precise workmanship, slightly anachronistic. Thanks to Ken I'm now wearing my Frederique Constant watch again. Not quite the one pictured here, mine doesn't have the date complication. It does have the window into the movement and a clear back.
The crazy thing about watches is you can easily spend $20,000 on one without getting gold or jewels. Just a lovely skeleton movement or a beautiful A. Lange & Söhne 1. The workmanship on the inside is as beautiful as the exterior. Alas, not in my range, so I just read along with the watch geeks.