Christopher Ward C900 User guide

C900 SINGLE PUSHER CHRONOGRAPH
LImItEd EdItION
O W N E R ’ S H A N D B O O K

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Having taken possession of a C900 Chronograph, you are now the owner of a very special timepiece; a
timepiece that has taken more than three years to create and one that everyone connected with Christopher
Ward is immensely proud.
Two master watchmakers, Johannes Jahnke and Jean Fillon, worked with our design team in Maidenhead
to realise Johannes’s dream of allowing the owner of such a complicated movement to see and understand
how the movement really works. The C900 is the realisation of that dream and is a perfect example of how,
through innovative design as well as fair and honest pricing, Christopher Ward is determined to make fine
watchmaking accessible to as many people as possible.
I encourage you to invest a little time in reading the following pages of this handbook which have been
designed to help you maximise your enjoyment of your new watch. And should you ever wish or need to talk
to me about your C900, you can contact me in the first instance by emailing, [email protected].
Kind regards,
Christopher Ward
WELCOME TO YOUR C900

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Nothing unites young and old so effectively as a shared passion. For some it is sport, for others it might be
music, art, classic cars, travel or history. But the common denominator which enabled 28-year-old Johannes
Jahnke and 87-year-old Jean Fillon to form an almost instant bond is their mutual fascination for horology - or,
more specifically, for solving the problems it so often produces.
Jean Fillon was just 24 years of age when he arrived at James Aubert, the Swiss movement manufacturer that
had been established in the early 20th century to specialise in supplying chronograph mechanisms for the
leading watch brands of the day.
Following founder James Aubert’s death at the young age of 59, Fillon was recruited as a director of the
company and expanded the business to include the production of stop watches designed for sport and aviation,
which were sold under a variety of high quality dial names in Switzerland, Germany and Japan. James Aubert
SA, as the company continues to be known, also developed complicated mechanisms for niche markets as
well as more widely used products.
Today, more than 63 years after his arrival, Fillon still wields his watchmaker’s tools with the deft hand of a far
younger man while his mind is as quick as ever to find solutions to those tricky horological conundrums which
leave the less experienced entirely stumped.
Johannes Jahnke, meanwhile, has already packed a remarkable number of achievements into his 28 years.
Born in the former East Germany, he grew-up watching (and helping) his father repair everything from old
watches to the family motorbike, a 1951 BMW, which had to be kept running as a matter of necessity.
The C900 Story by Simon de Burton

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After completing his military service, Jahnke studied in the famous watch-making town of Glashütte before
becoming apprentice to Marco Lang, a fifth-generation watchmaker who was one of the founders of Dresden-
based Lang & Heyne.
One of Lang’s dreams was to establish an entirely electricity-free workshop in which components are made
using manually-powered lathes – a return to the truly ‘handmade’ watch. It was an idea that Jahnke could
relate to well as he had grown up having to make do and mend with only the most basic tools. It led to him
making a prototype of a monopusher chronograph without resorting to modern machinery.
This resulted in the Lang & Heyne King Albert of Saxony watch, a £60,000 platinum work of art which was
produced in tiny numbers.
Since 2008, however, Jahnke has worked with a small, high-end firm in the watchmaking town of Biel,
which devises, develops and produces watch mechanisms for a few select watch brands – one of which is
Christopher Ward.
Here, Jahnke is allowed to work without constraints and allowed to realise, or attempt to realise, his wildest
watch-making dreams. When I visited him at his workshop in March, he had recently designed Christopher
Ward’s innovative Jumping Hour movement which, unusually, takes its power from the central-minutes
wheel, resulting in more efficient energy use and greater accuracy than conventional jump hour mechanisms.

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At the time, Jahnke told me of his latest project – the creation of another monopusher chronograph based
on a highly modified Unitas movement. More than six months later, this has come to fruition in the form of
Christopher Ward’s most sophisticated and complex watch to date, the C900 SP – a beautifully understated,
classic-looking chronograph powered by its own, exclusive, monopusher movement.
The tourbillon, the minute repeater and the perpetual calendar are often cited as representing the pinnacle of
the watchmaker’s art while the chronograph is regularly taken for granted. In reality, however, this mechanism
which can accurately dice time into fractions of hours, minutes and seconds remains one of the most noble
complications of all and is still among the most exacting to create – especially when its functions are controlled
by one pusher rather than the usual two.
It is partly for that reason that this new movement has taken almost three years to develop following Jahnke’s
discovery of a prototype chronograph in 2009 which was based on the well known Unitas 6497 calibre. Jahnke
was immediately taken with the thinking behind the mechanism, recognising similarities with the single
pusher movement he had developed at Lang & Heyne for the aforementioned King Albert single pusher
chronograph.
What really excited him about the Unitas project, however, was his belief that it could be extensively improved
both mechanically and aesthetically in order to create a superbly clean and functional wristwatch – and one
which would also offer instant appeal to horophiles due to the fact that the mechanics of the movement could
be clearly seen and understood.

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Jahnke did not, however, want to realise this new mechanism entirely alone and it is for that reason that he
sought the collaboration of Fillon, whose knowledge of creating and manufacturing parts for chronograph
movements had become the stuff of legend.
The prospect of working with such an industry veteran could have been daunting for Jahnke, who is Fillon’s
junior by more than half a century, but the old hand instantly recognised the abilities and talent of the
younger man who quickly came to affectionately refer to his mentor as ‘opi’ or ‘grandpa’.
Working together, the pair deconstructed the Unitas base and effectively re-designed its chronograph function
with hand-drawn, annotated sketches that enabled Jahnke to then reconstruct the module using a CAD
programme. The result was an extensively reworked movement with a new main plate, bridges, winding
mechanism, centre and second wheels.
A swan neck adjustment system was added and a clean, uncluttered dial designed at the Christopher Ward
studio that allows for the inclusion of a continuous seconds sub-dial and a 30-minute totaliser. Inverting the
watch, however, reveals the beauty of the new movement in all its glory. A wide transparent case back allows
the function of each component to be seen from the instant the single push piece is depressed to activate the
clutch, sliding gear and intermediate wheel which engage the minute counter. Press the pusher again and the
clutch separates, a brake lever is activated and the minute counter instantly stops.
‘The C900 Single Pusher Chronograph is beyond question our most complicated watch to date and will
make an entirely new level of sophistication accessible to more people than ever before because of the unique

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Christopher Ward value equation,’ explains Chris Ward.
‘However, it’s the magnificence of the movement
that really moves me. I was completely
transfixed when I first saw what Johannes
had accomplished and I don’t mind
admitting that I almost cried with a
combination of joy and pride.
We may produce even more
complicated watches in the future
but the C900 will always be a
very special watch for me. The
C900 SP ‘owner’s club’ will not,
however, be a crowded one. Due
to the complexity of its movement,
just 250 examples of the C900 SP, in
this form, will be available worldwide.

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JOHANNES JAHNKE – CREATOR OF THE JJ02 CALIBRE
Born in East Germany, Johannes first dismantled and repaired a broken clock at the age of 12. Championed
by Marco Heyne of Lang & Heyne, he first made a functional escapement model by building the wheels and
cogs by hand. The “King Albert of Saxony” is a column-wheel chronograph with a central minute counter.
The necessity for a vertical clutch, together with the position of the chronograph, makes this construction
extremely challenging. With some assistance from Lang & Heyne, in 2006 Johannes finished his watch.
“When ‘King Albert of Saxony’ went on sale there was a lot of buzz about me being so young but I don’t think
I am particularly special,” says Johannes. “A hundred years ago there were several watchmakers in their early
twenties making wonderful watches – there just aren’t any now.”
In 2008 Johannes, eager to produce watches that were not merely the preserve of monied collectors, was asked
to join Jörg Bader, Christopher Ward’s Swiss partner. The partnership with Christopher Ward that produced
the exciting Single Pusher Chronograph suits Johannes particularly well as the relationship allows him to
bring luxury watches within the reach of more people. He also appreciates the very close relationship the
company has with its customers.
“There are a lot of barriers between watchmakers and their customers and that is a shame. Creating a watch
for someone you don’t know and never hear from isn’t that rewarding.”
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The following pages are designed to give you a unique
insight into how the JJ02 Calibre complication inside
your C900 really works. Drawn from Johannes Jahnke’s
original CAD drawings, a little time studying them
will not only give you a thorough understanding of
how your watch works but also take you inside the
mind of a master watchmaker.
INSIDE YOUR C900

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KEY COMPONENTS OF CALIBRE JJ02
1Second transmission wheel
2Intermediate wheel
3Centre wheel
4Sliding gear lever
5Minute counter
6Minute counter jumper
7Minute counter heart
8Centre wheel heart
9Finger-piece
10 Clutch
11 Column wheel pusher
12 Column wheel
13 Break lever
14 Reset lever
15 Column wheel jumper
16 Minute counter
intermediate wheel
1
3
2
5
6
7
8
9
10
15 12
14
16
13
11
4
(Fig.1)

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THE 3 CYCLES OF THE SINGLE PUSHER MOVEMENT
1. Starting the chronograph
After pressing the Pusher (Fig 2) which sits inside the Crown, the Column Wheel pusher pushes the Column
Wheel one cog forward. The Column Wheel has 18 teeth and turns 20 degrees per step. The Column Wheel
Jumper locks the Column Wheel into the new position (Fig 3).
(Fig.2) (Fig.3)

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When the Column Wheel turns, the Break Lever releases the Centre Wheel (Fig 4).
(Fig.4)

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The Reset Lever now releases the Heart of the Centre Wheel and Minute Counter Wheel (Fig 5).
(Fig.5)

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The Clutch falls into the space between the Columns so that the Intermediate Wheel, which turns
continuously with the Second Wheel, is connected to the Centre Wheel (Fig 6). The Centre Wheel now turns
in the same direction as the Second Wheel.
(Fig.6)

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The Sliding Gear Lever falls between the Columns and the Minute Counter Intermediate Wheel moves to the
centre and engages the Minute Counter (Fig 7).
(Fig.7)

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The Finger-Piece, which is fixed to the Centre Wheel, pushes, after 60 seconds, one tooth of the Minute
Counter Intermediate Wheel. The Minute Counter Wheel turns one step forward when the Minute Counter
Intermediate Wheel Jumper rests between the next two teeth (Figs 8 & 9). This procedure repeats for as long
as the chronograph is working.
(Fig.8) (Fig.9)

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2. Stopping the chronograph
When you press the Pusher for a second time the chronograph stops (Fig 10).
(Fig.10)

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The Column Wheel turns one tooth forward, the Brake Lever falls into a space between the Columns and
holds the Centre Wheel in position (Fig 11).
The Clutch separates the Intermediate and Centre Wheels (Fig 12).
(Fig.11 (Fig.12)