While looking at this photo of a 24-hour clock: https://upload.wikimedia.org/wikipedia/commons/6/61/Greenwich_clock_1-manipulated.jpg
... it struck me that, maybe, it could be seen as a visual representation of how the sun "travels" (from our perspective) "around" the Earth, here seen "from the side" from space.
But I'm not sure it holds up. Is this accurate? I can almost swear that I've seen clocks where the "hour dial" is a sun, which would further hint at this.
If this is the case, I find it very fascinating and it will make me look at clocks in a whole new way. (Sadly, all the ones I've ever seen in real life have been 12-hour ones, so this visual representation cannot hold up for those.)