I really want to urge extreme caution when serial numbers from the mid to late 1990s starting with month code "J" are involved. There are just too many fakes with that month code, and the fakes are, for the most part, too accurate to risk it.
One thing that bothers me is that style wasn't introduced until early Fall 1997, not early Fall '96 like the serial indicates. But I'm worried about the serial number font. The first picture below is a fake J6D-9134, in a style that wasn't even introduced until 1999 - the font isn't exactly like the one in your bag but it's close. The second one is a genuine J6D- with the correct font.
As for the bag's details, I'm comparing it to this one:
http://www.ebay.com/itm/Coach-Vinta...525?pt=US_CSA_WH_Handbags&hash=item20e27dbc6d
The straps on yours are attched much further away from the middle of the bag and the turnlock tab, the bottom corners of the front panel look a bit more ounded on yours, the dowels on the tan one look thicker, and it looks like there's less movement possible in the straps because they're riveted more tightly together closer to the dowel, if that makes sense.
Here's another one similar to the tan one.
http://www.ebay.com/itm/COACH-Westo...713?pt=US_CSA_WH_Handbags&hash=item51bb945219
and a newer one but with the same strap placement as the tan and black ones
http://www.ebay.com/itm/COACH-Westo...721?pt=US_CSA_WH_Handbags&hash=item51bb945221
Every one I've looked at so far has the same strap placement and none of them match the straps on yours, and they're all from dates much closer to the actual introduction date. I don't think yours is genuine.