There's a little three-box strip on this site that I'm probably too proud of: Haut à Courroies, then Kelly, then Birkin. That's a hundred years of the luxury handbag in one line of type. Most famous bags stand alone. These three are a family, each one born from the last, and once you know how the descent actually happened, a lot of things start making sense: what these bags cost, why they get faked so relentlessly, and how to buy one without getting burned. So let me walk through the line properly.
The ancestor: a bag for a saddle
Before Hermès made handbags, it made a carrier for riding gear. The Haut à Courroies, the tall one with the straps, existed to haul saddles and boots around, and it's older than the whole idea of the luxury handbag it went on to father. Nobody can even agree on its birthday: some histories say 1892, others 1900. I've marked it circa in the file and recorded the disagreement instead of pretending to settle it, because that's the whole point of keeping a file. What you should remember is the shape. Tall body, short straps, a flap and a lock. Hold that image, because it comes back in 1984.
The document bag that waited forty years
Around 1935, and some histories say the design goes back to 1928, the maison brought out the Sac à dépêches: a structured, trapezoid, single-handle bag for carrying papers, descended from the equestrian line. It sold quietly for twenty years. Then in 1954 it was handed to an actress for a Hitchcock picture, and in 1956 that actress, by then Princess Grace of Monaco, used hers to shield her pregnancy from photographers. The picture went everywhere, and from that day the bag wasn't really the maison's anymore. It was hers. The public renamed it on the spot; Hermès took until 1977 to make it official, which I love, because it's one of the very few times in luxury history that a company let its customers rename its product. The Kelly file has the plate and the notes.
One thing worth knowing before you ever read a Kelly listing, because listings love to bury it: construction. Sellier means stitched on the outside over a rigid frame, sharp corners, formal. Retourne means stitched inside and turned out, softer all over. Same model, genuinely different bags, and the difference runs through the resale market like a fault line.
The flight
In 1984, on an Air France flight from Paris to London, an actress's basket bag spilled its contents, and the man in the next seat happened to run Hermès. Jane Birkin's complaint was simple and practical: the Kelly was beautiful and not much use for a life of travel. Jean-Louis Dumas sketched an answer right there, famously on an airsickness bag, and what he drew reached right past the Kelly, back to the ancestor: the HAC's tall proportions, opened up, with twin handles and none of the formality. The Birkin launched in sizes 35 and 40. Jane got her own custom one in 1985 and later admitted that, fully loaded, it was heavy enough to give her tendinitis. I consider that the most honest product review ever given in luxury.
Look at what the line did there. The Kelly was born from the saddle bag. The Birkin was born from a complaint about the Kelly, and went back to the saddle bag for its body. These three aren't just neighbors in a catalog; they're one design conversation carried on for a century.
What the line costs
Fame flows down the line in one direction, and counterfeiting follows it exactly. The HAC trades well below its own descendants despite being the reason they exist, with a fraction of the fake pressure, which quietly makes it one of the smartest buys in the catalog. The Kelly carries decades of forgery history. And the Birkin sits at the top of the entire counterfeit economy: the most faked luxury object on earth, all the way up to superfakes with plausible stamps and very confident listings. So I'll say the rule the way the file says it: there is no bargain Birkin. The discount is the warning.
Reading the line on a real bag
Here's where the family tree stops being a story and starts being a tool. Since 1945, Hermès has dated its leather with a single stamped letter, cycling through eras: plain letters, then circled ones, then squared ones, then plain again after 2014 in a scrambled order. Which means a plain letter is ambiguous on its own; a plain A can mean 1945 or 2017. But the family tree settles it. On a Birkin, a plain A can only be 2017, because in 1945 the Birkin was still thirty-nine years away from existing. That little bit of narrowing is exactly what the blind stamp tool on this site does, for every letter, against every model's documented history. Its bluntest verdict reads STAMP AND MODEL DISAGREE, and that's really this whole article in four words.
The full descent is in the Hermès file: six models, their plates, their notes, and the doctrine I'll keep repeating as long as I run this site: a stamp dates a bag, it doesn't authenticate one. The listing expires. The file doesn't.