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1. Glashütte, January 2015
ZEITWERK MINUTE REPEATER
A new sound of time – the first Lange watch with a decimal minute repeater
In the exalted category of chiming wristwatches, the ZEITWERK MINUTE REPEATER is a
technical sensation: articulately designed, it combines a mechanical jumping nu-
merals display with a decimal minute repeater for the first time.
The ZEITWERK MINUTE REPEATER is the
first A. Lange & Söhne model with a
striking mechanism that sounds the
hours, ten-minute intervals, and minutes.
The acoustic sequence precisely repro-
duces the digitally displayed time
whenever the striking mechanism is
triggered with a pusher. The dial time is
sounded with a low-pitched tone for each
elapsed hour, a double tone for each
elapsed ten-minute period, and a high-
pitched tone for each elapsed minute.
When they developed the strikework for
the ZEITWERK MINUTE REPEATER, the
engineers were able to harness the basic
principle of the jumping numerals
mechanism. The time is displayed with an
hour ring and two minute discs instead of
with hands. Three snails connected with
these mechanical display elements sepa-
rately sample the number of hours, ten-
minute intervals, and minutes to be
acoustically indicated.
In place of the conventional slide, the
ZEITWERK MINUTE REPEATER features an
elaborate pusher system for activating the striking mechanism. To maximise the quality
Seven low tones, five double tones, and two high tones are
struck at 7:52. The acoustic time faithfully corresponds to
the time indicated on the dial.

2. ZEITWERK MINUTE REPEATER, Page 2
of the sound, the engineers calibrated the movement with the case down to the smallest
detail. The tuning process requires acute hearing and is performed manually to achieve
harmony and reverberation of each gong separately and to assure perfect sonority in
unison.
Engineered down to the tiniest detail
Countless work steps and extensive fine-tuning are required to guarantee the smooth
interaction and long-term functional integrity of all mechanisms of which the 771-part
movement is composed. To rule out unintended, potentially damaging manipulations, the
designers incorporated a very useful safety feature. Since mechanical conflicts would
occur if the owner were to set the time during a chiming sequence, the crown cannot be
pulled while the striking mechanism is active: when activated, the winding train is
uncoupled from the ratchet wheel that powers it. This precaution prevents the winding
wheel train including the crown from turning while the gongs are being struck, which
would waste a considerable amount of energy. Additionally, the switching of the numeral
discs is delayed until the chiming sequence has ended. This takes about 20 seconds for the
maximum succession of tones at 12:59. The acoustic time indication therefore always
corresponds to the time displayed on the dial.
To assure that the repeater sequence is not prematurely interrupted due to the depletion
of the mainspring’s power – in which case the watch would stop running as well –, the
striking mechanism can no longer be activated if the remaining power reserve is less than
twelve hours. On the power-reserve indicator, this point is identified with a red mark.
Because the mainspring powers the striking mechanism via the ratchet wheel, the
number of minute repeater activations and their duration will influence the availability of
the underlying power reserve of 36 hours.
The contemporary face of a grand tradition
With its eminently legible jumping numerals display, the ZEITWERK MINUTE REPEATER
stands out as a paragon of eloquent design. The patented constant-force escapement
delivers a uniform amount of energy during the entire power-reserve period. As the
source of the switching impulses, it reliably controls the numerals display minute by
minute.
The L043.5 manufacture calibre inside the ZEITWERK MINUTE REPEATER is lavishly and
meticulously hand-finished. Beneath the hand-engraved balance cock, the balance wheel
with eccentric poising weights and a free-sprung balance spring crafted in-house

3. ZEITWERK MINUTE REPEATER, Page 3
breathes with a frequency of 18,000 semi-oscillations per hour. The resonant
timekeeping instrument with a diameter of 44.2 millimetres is available exclusively in
platinum. The solid-silver dial shimmers with a rhodié hue. Made of black-rhodiumed
German silver, the time bridge prominently frames the hour and minute numeral
apertures that are located on the same plane. The black-polished steel gong hammers are
visibly arranged on both sides of the subsidiary seconds dial. The hours are struck on the
left, the single minutes on the right. For the double-tone ten-minute counts, both
hammers strike both gongs slightly offset in time.
Lange manufacture calibre L043.5
Lange's ZEITWERK MINUTE REPEATER is the second model of the ZEITWERK family to be
endowed with an acoustic time indication. With its unusual design, it represents a further
milestone in A. Lange & Söhne's impressive repertoire of innovative timepiece concepts.
*****

4. ZEITWERK MINUTE REPEATER, Page 4
About A. Lange & Söhne
When Ferdinand Adolph Lange, a Dresden watchmaker, established his watch manufactory in 1845, he laid the
cornerstone of Saxony’s precision watchmaking. His precious pocket watches remain highly coveted among collectors
all over the world. The company was expropriated after World War II, and the name A. Lange & Söhne nearly fell into
oblivion. In 1990, Ferdinand Adolph Lange’s great-grandson Walter Lange had the courage to relaunch the brand.
Today, Lange crafts only a few thousand wristwatches in gold or platinum per year. They are endowed exclusively with
proprietary movements that are lavishly decorated and assembled by hand. In a period of little more than 20 years,
A. Lange & Söhne developed 51 manufacture calibres and secured a top-tier position among the world’s finest watch
brands. Its greatest successes include innovative time-keeping instruments such as the LANGE 1 with the first outsize
date in a series produced wristwatch as well as the ZEITWERK with its supremely legible, precisely jumping numerals.
In the meantime, both models have become icons of a brand rich in tradition.
Online information
alange-soehne.com
facebook.com/langesoehne
youtube.com/user/alangesoehne
Contact information for the media
Arnd Einhorn, Director Press and PR
Tel.: +49 35053 44-5505
E-mail: presse@lange-soehne.com

5. ZEITWERK MINUTE REPEATER, Page 5
ZEITWERK MINUTE REPEATER Ref. 147.025F
Movement Lange manufacture calibre L043.5, manually wound, crafted to
the most exacting Lange quality standards, decorated and
assembled by hand; precision-adjusted in five positions; three-
quarter plate made of untreated German silver; balance cock
engraved by hand; constant-force escapement
Movement parts 771
Jewels 93
Screwed gold chatons 3
Escapement Lever escapement
Oscillator Shock-resistant balance wheel with eccentric poising weights;
balance spring manufactured in-house, frequency of 18,000
semi-oscillations per hour; precision beat adjustment system
with lateral setscrew and whiplash spring
Power reserve 36 hours when fully wound if the striking mechanism is not
activated
Functions Time display in hours and minutes with precisely jumping
numeral discs, subsidiary seconds with stop seconds, power-
reserve indicator, decimal minute repeater
Operating elements Crown for winding the watch and setting the time; pusher for
activating the striking mechanism
Case dimensions Diameter: 44.2 millimetres; height: 14.1 millimetres
Movement dimensions Diameter: 37.7 millimetres; height: 10.9 millimetres
Crystal and back Sapphire crystal (Mohs hardness 9)
Case Platinum
Dial Solid silver, rhodié
Time bridge Black rhodiumed German silver
Hands Rhodiumed gold
Strap Hand-stitched alligator leather strap, black
Buckle Lange deployant buckle in platinum