The Gentleman Magazine Issue 4 | August/September | Page 11

1815 CHRONOGRAPH IN BLACK AND WHITE
As an extension of the 1815 watch family, A. Lange & Söhne The calibre L951.5 movement also powers the new 1815
CHRONOGRAPH in the 39.5-millimetre white-gold case.
The rhodiumed hands ensure superb legibility against the
backdrop of a jet-black solid-silver dial.
1815 CHRONOGRAPH in white gold with black dial Heart rates can be determined with the pulsimeter scale on
the outer ring of the dial. It is graduated from 40 to 200 beats.
When the time for 30 beats is measured, the peripheral scale
indicates the heart rate per minute. The personality of this
new member of the 1815 family, characterised by contrasts
between light and dark, is underscored with a black alligator
leather strap and a solid white-gold Lange prong buckle.
is presenting a further version of the 1815 CHRONOGRAPH
with the stopwatch function. It persuasively com- bines a
white-gold case and a black dial with a pulsimeter scale.
The ability to measure times has always been one of the most
useful and exciting functions of a mechanical watch. This
applies in particular when the many levers and springs of the
chronograph can be observed in action. A. Lange & Söhne
has been crafting models with stopwatch functions since 1999
– fitted with sapphire-crystal casebacks like all other Lange
watches.
The 1815 CHRONOGRAPH was added to the 1815
family in 2004. It is a paragon of classic design combined
with advanced technology. The traditional style elements
reminiscent of
Glashütte, June 2017 the pocket-watch era include the
railway-track minute scale and the symmetrically ar- ranged
subsidiary dials – the subsidiary seconds on the left and the
30-minute counter on the right. They emphasise the balanced
proportions of the watch.
A sapphire-crystal caseback reveals the sublime architecture
and lavish finissage of the chronograph movement. It provides
an enlightening glimpse of the complex switching se- quences.
Among others, it shows the column wheel that controls the
chronograph func- tions, the levers of the flyback mechanism,
and the snail of the precisely jumping minute counter. The
escapement is readily visible as well.
Hallmarks of the Lange style include the whiplash spring of
the precision beat-adjustment system on the hand-engraved
balance cock.
In 2010, the 1815 CHRONOGRAPH was endowed with
a new movement. It has a power re- serve of 60 hours and
features a manufactory-made free-sprung balance spring. Its
care- fully calibrated interaction with the large, cam-poised
balance guarantees excellent rate accuracy. Because it beats at
a frequency of 18,000 semi-oscillations per hour (2.5 hertz),
the watch can measure times with an accuracy of one fifth of
a second.
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