From what I understand, the 2 letters denote the artist, the first 2 numbers denote the model year and style and the last 2 denote the color and pattern... something to that effect. Is that what you are on as well? Yeah, the number is only meaningful to some, especially to collectors. I have a reference built by myself, and I am sure that other collectors also have their own references, but no-one ever put them online. Unlike Hermes scarf which has extensive online reference. I guess, us guys just want to keep things to ourselves.