We've seen a few that may be fake bullseye stamps. There's no reason why counterfeiters couldn't copy that stamp. But since outlets are a mainly U.S. phenomenon, it probably hasn't occured to the crooks -
yet.
As for newer leather bags - fakes are getting harder and harder to spot. Sometimes the creed and serial number are the only things that aren't quite right on the fakes. Many of those are coming either directly from or through the Philippines, which is why we have to advise people not to buy from Philippine sellers even if they're also from the same country. There are "superfakes" in Coach just like there are in LV and other highlane brands, and I'm sure we're probably missing some that are exceptionally accurate.
Handbags and wallets are currently listed as the most counterfeited type of product in the US.
http://247wallst.com/special-report/2014/03/27/americas-nine-most-counterfeited-items/
"...Luxury items tend to be the most counterfeited products because they are more valuable, according to Randazzo. And with better counterfeiting methods, there is a greater challenge of detection as well as potential for even higher profits, she explained. Consumers can no longer take for granted obvious signs of imitation such as poor stitching or bad zippers. Now, the quality [of fake products] has improved so dramatically that [criminals] have been able to charge at prices closer to the price of the genuine article.
All we can do here is give our opinions based on the best knowledge we have at the time. The only way to be 99.9999 percent sure that you're getting a real bag or wallet is to buy it directly from Coach.