When I was a radio technician apprentice in the early 80's, the technical college we attended also taught watchmakers, as part of their education, they would build a
digital clock based on TTL circuits, and that was something we as electronic nerds could totally relate to. This is a kind of homage to these bright people, a full functioning
and almost precise TTL based 24 hour digital clock, build in CircuitVerse simulator, watch and learn....