Hermès prototype Birkin up for sale at Sotheby’s July 10
$RMS.PA
This should be interesting. There are many Birkins out there, but only one was the first one. Not sure it'll be the most expensive one ever since it's in competition with some diamond studded ones, but the price will be high.
Source (paywall):
https://www.nytimes.com/2025/06/05/style/birkin-bag-hermes-auction.html