There's another style number that's been showing up on fakes.
The counterfeiters are getting more creative. Having seen that Coach is indicating department store exclusives with a letter code at the end of the serial number, fakes are showing up that way too.
Beware of style 1814M. That style is showing on various patterns of soho flap bags, some with optic signature patterns and some with regular signature patterns. Prefixes (I've been seeing) have 2002 and 2003 year codes.
(This might already be posted here somewhere but I didn't see it, or I didn't look hard enough.)