Mr De Winter is wearing a particular tie when he had breakfast with the narrator and a different tie when he and the narrator go for a drive immediately afterwards.
Emilia Fox has both ears pierced, twice, in each ear lobe, and this was clearly visible while portraying the character of the second Mrs de Winter, even though she only had one pair of earrings in at a time. In the 1920s piercing the ear multiple times was unheard of, and did not come into fashion until the 1980s.