I`m officially crazy, because it´s 03:39 a.m. here, I just got back from a night out with friends, but I simply had to share my excitement. I talked to a friend of a good friend of mine and turns out she used to work at Bottega, when there still was a store here in Vienna (in the mid-90s!)! I asked her if she could still decipher old Authentication Codes and she told me how to do it! I took this example to explain it better: http://cgi.ebay.com/AUTH-BOTTEGA-VENETA-OVERSIZE-VENETA-BAG-1790_W0QQitemZ280135965174QQihZ018QQcategoryZ63852QQrdZ1QQcmdZViewItem So, in bags, the code always starts with "100" or "105", because 1 stands for the category of bags. Second comes the material (in this case "001" for Intrecciato, "005" is something called Kent, a material that they used back then, usually "009" for fabrics) Then, a 5-digit code for the product. Bags are starting with 0, "05390" stands for the Veneta and she told me that it`s like the bigger the bag, the bigger the number ("01..." for small clutches, "07..." for big totes). Small Leather Goods start with a 2 ("25..." for card holders, "27..." for key cases and so on) And last but not least a code of 2 or 3 letters for the color (TER standing for Terre, NE for Nero and so on). I hope this will help with authenticating older BVs!