Factual error: Behind Jack and Miss Fisher as they are waiting to get an answer about the whereabouts of Jane's mother there's a wall calendar that has November 4 as a Tuesday - wrong for 1928, and also inconsistent with the other calendar seen in the episode, in the kitchen. (00:43:00)
Factual error: The calendar behind Hugh when Dot restores the beer coaster points at November, consistent with the pacing of the show. It's not a November 1928 calendar, though, the first day should have been a Thursday. (00:24:00)
Answer: Louisa's watch was broken during the struggle to get away from her attacker.
Bishop73