The information I collect on plant codes changes constantly, and this is being added to my files. Some of the China plant codes might have been used very briefly in US plants that were only open for a short time and this may be one of them. The FS stamp to the right of the creed isn't something you'd find in a fake, so it's almost certain there WAS a J plant open in the US or one of its terretories at one time. Other possibilities are that a fake was returned to a
Coach store or outlet and ended up being marked down as a Final Sale item, or the bag just didn't meet production standards and was reduced for final sale, or even that Coach may actually have been making some test bags in a Chinese plant but marked them with a Made in US creed.
The big problem with the Court Bag you mentioned from a previous post is that the year code is for 2002, and by that time the J plant was already producing bags in China. J codes are pretty common in styles from the early 2000s so a J code marked as US-made from April 2002 would have been strange. But as always, something could turn up later to make me change my thinking. A pic of that creed is below. Remember, NONE of this information comes from Coach since they've never released any of it publicly. EVERYTHING on plant codes has to be figured out from the bags themselves, and maybe not all of those are genuine either.
The overlarge zipper pull is unusual, I've seen similar designs on genuine bags though. It probably wasn't on the bag originally since silver hardware wasn't even used in 1997 with the possible exception of one very early Chinese plant that I've only seen on one other bag that I'm still not completely sure about. It also looks like the grommets around the buckle holes in the strap are silver-tone instead of brass but that could just be a trick of the light.
There aren't any easy answers and what went on behind the scenes is something we'll never know. Trying to figure it out is mostly a matter of guesswork. On your Janice's Legacy the creed stamp itself seems ok, the serial number font is a bit large but that could just be a quirk of that particular plant, the strap grommets are a question mark, and the zipper pull may be a plant mistake or a later repair. So in this case, you're guess is as good as mine, because all I can do is guess.