The one thing Sherlock got wrong! In the second episode of
series 1, 'The Blind Banker', Sherlock deduces that Sebastian had
been abroad twice in the last month from the fact that the date on
his watch was out by two days. When John later questions how
Sherlock knew it was within a month, he explains, "New Breitling.
Only came out this February." The model featured is a Breitling
Crosswind, popular for many years but no longer in production. The
nearest equivalent is probably the Chronomat.