I believe in the last couple of years, Zenith was not included in the sale. I haven't checked the sale in the last couple of years, but from what I remember, the discount was only slightly more than what you could get from an authorized dealer (there are a few pieces with more discount). Also, from what I've heard, watches bought from the F&F sale do not qualify for full warranty. Plus don't forget, if you declare at the border bringing it back, you may get dinged with tax/duty.
Here is a picture of my Zenith duo though