There’s an exquisite and extremely rare timepiece from A. Lange & Söhne headed for the auction block in two weeks. As detailed in this Robb Report post, while the exact number of Lange 1 watches produced is known only to the company, the model is without question quite rare, as it was only produced at the request of select clientele and jewelers. If you’re a collector, you won’t want to miss the May 13th auction to be held at Christie’s, as another Lange 1 is unlikely to come available again anytime soon.