A Lange & Sohne
Black with silver sub-dials
Manual Wind COSC
Lange Caliber L951.6 (18,000vph, 451 parts, Lever escapement)
Hours, Minutes, Outsize date, Flyback Chronograph, Power-reserve indicator
Flyback chronograph. 30-minute totalizer at 4 o'clock. 1/5 second center sweep seconds. Instantaneous reset-to-zero activated by lower chronograph push-piece
Sapphire - Anti Reflective
Sapphire Crystal Display Back secured by 6 screws
For more than a decade, A. Lange & Söhne’s Datograph was considered by many to be the quintessential chronograph. On the one hand, it was because of its technical features, on the other because of the unparalleled harmony of its dial. With a number of enhancements, Lange’s engineers are now proving that excellence can be taken a step further. With a power reserve extended to 60 hours, a power-reserve indicator, and a proprietary oscillation system, the new Datograph Up/Down shines in a platinum case enlarged to a diameter of 41 millimeters.
When it was first presented in 1999, the A. Lange & Söhne Datograph already attracted global attention. With its sophisticated technology and subtly balanced design, it clearly stood out from the masses of timepieces with stopwatch functions. The classic column-wheel calibre with a precisely jumping minute counter and flyback function united the cardinal virtues of an exemplary chronograph in a movement of peerless mechanical eloquence and aesthetic appeal. These internal assets were complemented on the outside by the harmony of the dial ensemble: forming an equilateral triangle, the Lange outsize date and the two bright subsidiary dials for the seconds and the minute counter contrasted well against the black dial, assuring superb legibility.
The new Datograph Up/Down embodies all these features as well. Additionally, Lange’s engineers and product designers worked intensely to refine it further. What meets the eye first is the larger case. With a diameter increased to 41 millimetres, this timepiece gains extra prominence on the wrist. Rhodiumed gold baton hour markers on the dial – they also replace the former Roman numerals II, VI, and X – emphasize its clear design and identify the watch as a member of the Saxonia family that was just revised last year. A small detail is typical of the perfectionism pursued at Lange: The aperture of the date display was adjusted to match the bigger size of the case. It was enlarged by four percent to preserve the balanced proportions of the dial architecture.
The designation “Up/Down” in its name refers to an additional function: A power-reserve indicator at 6 o’clock reliably tells the owner how much of the extended 60-hour running time remains available. Only when the hand enters the red zone on the third day will it be necessary to supply the calibre L951.6 movement with fresh energy. The 24 extra power-reserve hours versus the previous model were achieved mainly with a larger mainspring barrel.
The large balance developed by Lange and crafted in-house has six eccentric poising weights that can be very precisely adjusted to fine-tune its rate accuracy. It is powered by a balance spring, also developed and crafted on site by Lange. To assure optimised rate values at its classical frequency of 18,000 semi-oscillations per ￼hour, the spring is scrupulously matched to the characteristic of the movement.