Famed auction house Christie’s will offer its most valuable and historically important selection of vintage Rolex wristwatches ever, including the brand’s most expensive model, at its Important Watches sale that will be held in Geneva on May 13. The extraordinarily rare, oversized stainless steel split seconds chronograph wristwatch, Ref. 4113, was manufactured in 1942 and is expected to bring in up to $1.3 million. The only split seconds chronograph wristwatch ever made by the legendary Swiss watchmaker, Reference 4113 is considered the rarest and most exclusive Rolex ever created.

One hundred and fifteen Rolex watches in all will be offered at the incredible sale, including an extremely fine one-of-a-kind gold chronograph “Paul Newman” Daytona, Ref. 6241, which was manufactured in 1968 and retailed by famed French fashion house Hermès. Estimated at up to $420,000, it is marked by the Hermès stamp on the back of the case, and is the only known Daytona model to bear this distinguished symbol. Also on offer at the sale will be a collection of Patek Phillippe watches, including a newly rediscovered, historically important white gold perpetual calendar wristwatch with moon phases. Ref. 3448 was manufactured in 1981 and is estimated to bring in up to $1.5 million.