The sublimely perfect four-hand 1815 Up/Down with a power-reserve indicator reflects the A. Lange & Söhne style in its purest form. The number 1815 in its name refers to the birth year of the founder of Saxon precision watchmaking, Ferdinand A. Lange – its design is inspired by his legendary pocket watches.
A. Lange & Söhne’s 1815 timepiece stands for noble understatement at the pinnacle of horology. Its three-day movement has now been paired with a power-reserve mechanism. In the new 1815 Up/Down, an additional blued-steel hand at 8 o’clock indicates how long the watch will continue to run before having to be rewound.
The principle employed in the 1815 Up/Down also relies on a patent filed by Otto Lange, one of the grandsons of the manufactory’s founder. His invention was specially conceived for slender watches: a planetary gear system integrated in the movement drives the display without requiring extra vertical space. Lange adopted the same approach for the power-reserve indicator of the 1815 Up/Down. On the plate side, two additional gold chatons in the three-quarter plate made of German silver refer to the presence of the power-reserve mechanism. Despite the supplementary 57 parts, the L051.2 manufacture movement has exactly the same dimensions as that of the 1815 without the Up/Down indicator: a height of 4.6 millimetres and a diameter of 30.6 millimetres. Beneath the hand-engraved balance cock, a classic screw balance and an indexless oscillator assure optimised rate accuracy together with a balance spring developed and manufactured in-house, which is calibrated to a frequency of 21,600 semi-oscillations per hour.
With its 245 parts lavishly finished by hand, manufacture calibre L051.2 features a host of hallmarks that underscore Lange’s watchmaking artistry: they include chamfered and polished edges, Glashütte ribbing on the three-quarter plate, gold chatons secured with blued screws, the polished endpiece of the escape-wheel cock, and winder wheels decorated with solarisation that are visibly integrated in the plate.
The case and prong buckle of the 1815 Up/Down are crafted from 18-carat yellow, white, or pink gold; all model variations have an argenté dial made of solid silver. Superb legibility is guaranteed thanks to black numerals and blued-steel hands. With a railway-track minute scale, Arabic numerals, and symmetrically arranged subsidiary dials for the power-reserve indicator and the small seconds, the 1815 Up/Down pays tribute to the style elements of Lange’s acclaimed pocket watches, now transposed in a contemporary way to the dimensions of a wristwatch.
Lange manufacture calibre L051.2, manually wound, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; balance cock engraved by hand
Movement parts: 245
Screwed gold chatons: 7
Escapement: Lever escapement
Oscillator: Shock-resistant screw balance, superior-quality balance spring manufactured in-house, frequency 21,600 semi-oscillations per hour, precision beat adjustment system with lateral setscrew and whiplash spring
Power reserve: 72 hours when fully wound
Time indicated in hours, minutes, and subsidiary seconds with stop seconds; power-reserve indicator
Operating elements: Crown for winding the watch and setting the time
Diameter: 39.0 millimetres; height: 8.9 millimetres
Diameter: 30.6 millimetres; height: 4.6 millimetres
Crystal and caseback
Sapphire crystal (hardness 9)
234.021: Yellow gold case, Solid silver, argenté dial, Blued steel hands, Hand-stitched crocodile strap, middle-brown, Prong buckle in yellow gold
234.026: White gold case, Solid silver, argenté dial, Blued steel hands, Hand-stitched crocodile strap, black, Prong buckle in white gold
234.032: Pink gold case, Solid silver, argenté dial, Blued steel hands, Hand-stitched crocodile strap, reddish-brown, Prong buckle in pink gold