What you’re looking at is an example of the most important wristwatches of the last 30 years.

The Lange 1 is without question the manufacturer’s flagship model, and the big date function is its hallmark. Though found in watches like the Zeitwerk or the Langematik Sax-O-Mat, it’s in the Lange 1 that it’s shown to the greatest effect. Alongside other details such as asymmetrical sub-dials depicting the hours and sub-seconds, and the A. Lange & Söhne signature with its famous ampersand, it shows a clarity of vision that is wholly Lange. And while the Lange 1 has seen manyversions, from a tourbillon to the Timezone, it’s the original that has become the symbol of the maison — and perhaps even the symbol of modern watchmaking itself.

This particular example from circa the early 2000s, features a 38.5mm 18K yellow gold case with a sapphire crystal, a matching 18K polished bezel, a satin silver dial with subsidiary hours and minutes at 9 o'clock; a seconds register at 4 o'clock; a power reserve indicator at 3 o'clock; a yellow gold framed date window at 2 o'clock; applied yellow gold indices with and a matching handset, and a brown alligator leather strap with a matching yellow gold 'Lange' signed pin buckle.

Powering this masterpiece is the Lange & Söhne CaliberL901.1, a manual-winding movement that’s stunning to behold — and which can thankfully easily be viewed via the exhibition case back.

There are complicated watches, and then there are works of art. This is the latter.