Amazing o-O
Thinking about it, it might have something to do with the quartz oscilator on the clock, since you probably can get 2048hz from 32768hz easily. Now I can surely generate it by hand, thank you so much!
I'm still researching on the topic, since this became a really weird rabbit hole, I sent some e-mails to Hoseki, since they seem to have a lot of patents related to clocks and circuits, but I can't understand most of them cause they are in Japanese. I'm now wondering on who did this first, I doubt I'll easily find it, but its fun kinda.