I saw this one. I asked the seller for the number but I didn't receive an answer. I think the year code looks like a 4. I'm seeing 4143 for the style too. The style looks like a Prairie bag but the shape of the strap end is wrong and the stitching looks sloppy. I can't say for certain that it is fake without seeing a legible picture of the creed.
The serial prefix looks like M4K then 4143. There's a J4K-5180 briefcase listed that's an obvious fake since the "new" style turnlock is more than a year too early.
http://www.ebay.com/itm/Authentic-C...?pt=US_Unisex_Accessories&hash=item33858d1ea2
Just noticed BB has the prefix as H4B- which would DEFINITELY make it fake.