About the A. Lange and Söhne Grand Lange 1 Moon Phase
The Lange 1 family is one of the most recognizable watch designs in fine watchmaking, distinguished by its asymmetric dial layout that positions the outsize date, subsidiary seconds, power reserve indicator, and now the moon phase in a deliberate, off-center arrangement unique to the brand. The Grand Lange 1 Moon Phase scales the case to 41 mm to accommodate a southern-sky moon phase display of exceptional astronomical accuracy, requiring a correction of only one day in roughly 122 years. Crafted in precious metals including yellow gold, pink rose gold, and platinum, the collection pairs intricate hand-engraved balance cocks and German silver three-quarter plates with dials finished in argenté silver, rhodié silver, or the special Lumen treatment that glows in darkness. Together these elements make the Grand Lange 1 Moon Phase one of the most sought-after complicated dress watches for collectors who value both technical mastery and restrained German aesthetic.
What to Look For
Buyers should pay close attention to case metal and dial treatment, as yellow gold references like the 139.021 carry a warm ivory argenté character distinct from the cooler rhodié silver of the platinum 139.025 or the blush-toned argenté silver of the rose gold 139.032, and each pairing commands a different position in the secondary market. The limited Lumen reference 139.035F is particularly collectible given its Super-LumiNova dial construction, which makes it a rarer and typically more valuable find whether you are looking to buy new or pre-owned. Condition of the dial, originality of the bracelet or strap, and completeness of box and papers are the primary value drivers when comparing Grand Lange 1 Moon Phase watches for sale.
Frequently Asked Questions
What case size is the Grand Lange 1 Moon Phase?
The Grand Lange 1 Moon Phase is offered in a 41 mm case across all references in this collection, including the yellow gold 139.021, the platinum 139.025, and the pink rose gold 139.032. The 41 mm diameter distinguishes it from the standard Lange 1 and provides the dial real estate needed to house both the outsize date and the moon phase complication without crowding.
What is the Lumen variant of the Grand Lange 1 Moon Phase?
The Grand Lange 1 Moon Phase Lumen, reference 139.035F, is a special edition in a platinum case featuring a dial with Super-LumiNova applied to key elements so that the moon phase and other display functions become visible in darkness. Because of its distinctive appearance and limited production, the Lumen is considered one of the most collectible references in the Grand Lange 1 Moon Phase lineup and is harder to find on the secondary market.
How accurate is the moon phase on the Grand Lange 1 Moon Phase?
A. Lange and Söhne engineers the moon phase display in the Grand Lange 1 to deviate by only one day in approximately 122 years, making it one of the most astronomically precise moon phase mechanisms in production watchmaking. This level of accuracy is achieved through a carefully calculated gear ratio rather than a simple 59-tooth wheel, and it is a defining technical hallmark of the reference across all metal variants in the collection.
Buy, trade, or sell. Contact Bizak & Co. for pricing and availability on any reference in this collection.
