The design has transitioned from sketch book to CAD. I’m trying to keep everything balanced and bulky, so that I’ll be able to make all these small parts (the cams and gears in the following screenshot are each 0.4mm thick, and the watch diameter is 36mm).
There’s still a lot of detail work to do, however I feel like it’s coming together! I’m even starting to wonder about the hands and dial. Maybe something like this:
To skeletonize the dial or not, that is the question. Another question is whether to have center seconds, or seconds at six o’clock.
Making A Perpetual Calendar Watch 