If there were one, the real medieval clock would be looking like this.
The idea is simple: the life of the medieval monks was a lot regulated and including the daily schedule. If it’s dark, you lay down on your bedroll and sleep until the dawn. Then someone wakes you up - in the middle of the night - and you both go to recite the prayer, then you read the books in the flickering light of a candle (it’s still a night!), then another prayer and so on, you got the idea.
I think it would be way more authentic, than the modern dial, WH put there.
I’m not an artist nor modder, so can’t really help, but if anyone is looking for an idea - well, this one is at least
history lore history friendly.
Matins (during the night, at about 2 a.m.); also called Vigil and perhaps composed of two or three Nocturns
Lauds or Dawn Prayer (at dawn, about 5 a.m., but earlier in summer, later in winter)
Prime or Early Morning Prayer (First Hour = approximately 6 a.m.)
Terce or Mid-Morning Prayer (Third Hour = approximately 9 a.m.)
Sext or Midday Prayer (Sixth Hour = approximately 12 noon)
None or Mid-Afternoon Prayer (Ninth Hour = approximately 3 p.m.)
Vespers or Evening Prayer (“at the lighting of the lamps”, about 6 p.m.)
Compline or Night Prayer (before retiring, about 7 p.m.)