About the A. Lange & Söhne Lange 31
A. Lange & Söhne, revived in Glashütte, Germany in 1994 after decades of dormancy, established itself almost immediately as one of the world's foremost haute horlogerie manufactures through uncompromising in-house movements and meticulous hand-finishing. The Lange 31 debuted as a showcase of the brand's engineering ambition, achieving its landmark 31-day power reserve through a constant-force escapement driven by a mainspring tensioned via a special winding mechanism—a solution that also delivers remarkable isochronism throughout the entire running cycle. Produced in the Saxonia family, which encompasses Lange's cleaner-dialed and more architecturally pure references, the Lange 31 is offered in precious metal cases including white gold and yellow gold, keeping production deliberately limited and demand consistently high. Its outsize date display, a hallmark across many Lange references, appears at 12 o'clock and remains one of the most legible and aesthetically distinctive date complications in fine watchmaking.
What to Look For
Collectors buying a Lange 31 should pay close attention to case material and dial color, as each combination—such as white gold paired with a grey dial in reference 130.039F—commands its own valuation in the secondary market and carries different collector desirability. The 45.9 mm case size is consistent across references, so condition of the case, presence of original box and papers, and service history are the primary value drivers for pre-owned examples, while new-old-stock and unworn pieces carry a meaningful premium. Because the Lange 31 is produced in very limited numbers, any authenticated example in excellent condition represents a rare acquisition opportunity.
Frequently Asked Questions
What makes the A. Lange & Söhne Lange 31 special?
The Lange 31 is defined by its 31-day power reserve, an engineering achievement accomplished through a constant-force escapement and a sophisticated mainspring system that maintains consistent torque delivery for the entire month. This complication, combined with Lange's signature hand-finishing and outsize date display, makes it one of the most technically distinguished wristwatches in production.
What is reference 130.039F and what does it include?
Reference 130.039F is a Lange 31 housed in a 45.9 mm white gold case with a grey dial, representing one of the more understated and collector-favored configurations in the model's lineup. It embodies Lange's Saxonia design language—clean, symmetrical, and focused on the movement's technical narrative rather than decorative flourish.
Is the Lange 31 a good investment watch to buy?
The Lange 31 is produced in limited quantities in precious metals, which historically supports strong value retention and, in desirable references, appreciation over time. Its combination of technical rarity, Glashütte provenance, and restrained aesthetics appeals to serious horological collectors, making authenticated examples offered by trusted dealers like Bizak and Co. particularly sought after.
Buy, trade, or sell. Contact Bizak & Co. for pricing and availability on any reference in this collection.
