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reverie
2015-01-21 20:17

『转载』The Lange Zeitwerk Minute Repeater

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[tr=transparent][td=80%]转自timezone

The Lange Zeitwerk Minute Repeater: Live report

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Mon, 19 January 2015 18:12

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The Zeitwerk first made its appearance as the new design language for A. Lange & Söhne in 2007, and since then has been used as a base movement for the Zeitwerk Phantom and Zeitwerk Striking Time. In this new 2015 debut, the Zeitwerk takes on a complication revered by collectors as one of the most difficult to executed and therefor deserving of the most respect.

This complication is the Minute Repeater. But as is typical for Lange, it is not enough to produce a totally classical interpretation of the minute repeater, but one with a twist to tradition, but yet totally in line with the digital time display on the dial - the striking mechanism strikes in digital fashion. In a traditional minute repeater, the striking mechanism strikes the hours, the number of quarters that have passed since the last full hour, and the minutes from the quarter. This is made to simplify the mechanism of the already complex movement required to perform the striking. In a decimal repeater, the watch strikes the hours, the number of ten minute intervals since the last full hour, and the minutes.

Pic above shows the detail on the dial, showing the hammers which takes design cues from the Time Bridge. Note the exposed gongs, allowing the one to see the strikes as it happens.

The concept of the decimal repeater is not new. Kari Voutilainen was the first to incorporate this in his line of several piece unique
Decimal Repeaters. Most modified from pocket watch repeater movements with traditional striking mechanism. In SIHH 2014, Jaeger LeCoultre released the Hybris Mechanica 11, which also featured a decimal repeater.

As the base is the Zeitwerk, the movement, caliber L043.5 features the remontoir d'égalité,
and is extremely well finished. The movement is reminiscent of the original L043.1, but with a longer remontoir bridge, and a more elaborate finish for the mainspring barrels.

The photo above shows the bridge under which resides the remontoir mechanism. This bridge is longer and more elaborate than the original Zeitwerk bridge as in caliber L043.1

Movement finishing is typical Lange standard, with all the decorative finishing done par excellence
. Our only very minor wishlist which is not totally fulfilled in the movement has more to do with the design and stylistic elements rather than in the execution of the finnisage
. In particular, we would have preferred that the internal angles on the bridge openings be sharply finished instead of rounded. We note, however that the anglage is done to perfection, leaving one breathless as one gazes into the movement...the anglage gleaming as it catches the light.

The bridge holding one of the regulators for the activation mechanism for the repeater. This is the heart of the safety system which prevents the watch from being wound when the repeating mechanism is activated. It also prevents the digital display from advancing while the watch is striking. As it takes 1 minute 20 seconds for the maximum number of strikes to occur at 12:59, this prevents the display from advancing to 1:00, and ensures that the strike counts is always the same as the time displayed.

The movement features the in-house balance, as is common in all new calibers from 2004, the first being the Double Split.

The in-house manufactured balance system is used in the L043.5, as it has been a feature in all calibers since 2004.

The mainspring barrel cover is now more elaborately decorated than in the original Zeitwerk.
As the time keeping functions share the same barrel with the striking mechanism, an additional precaution, the watch is blocked from its striking function when the power reserve falls below 12 hours.