Zenith EL PRIMERO 21 User manual

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USER GUIDE 2-13

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MANUAL DE USUARIO 86-97

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> 1. EL PRIMERO 21 MOVEMENT

> 2. WINDING THE WATCH

> 3. WINDING THE CHRONOGRAPH

> 4. SETTING THE TIME

> 5. TIMEKEEPING FUNCTION

> 6. ZENITH'S INTERNATIONAL WARRANTY

> ZENITH

EL PRIMERO 21 (CALIBRE 9004)

Having invested in a ZENITH chronograph, you are now wearing

a Manufacture watch.

ZENITH is part of a select circle of authentic Swiss watch

manufactures that develop and produce their own movements.

Since 1865, we have been manufacturing our watches in the

same place, at our Manufacture at 34 rue des Billodes, in the

village of Le Locle situated in the mountainous valleys of the

Canton of Neuchâtel. There are few brands in the world that can

pride themselves on having an approach as rigorous as ours.

From the very moment you invest in a Zenith watch, you can be

absolutely certain that you are in possession of a watch that has

been produced from start to ﬁnish at the Le Locle Manufacture.

Having won more than 2333 chronometric observatory prizes,

ZENITH is one of the Swiss brands that has been most highly

rewarded in terms of accuracy. You can further share our

passion for this fine craft by visiting our website www.zenith-

watches.com. As an owner of a ZENITH watch you are invited to

sign up. By doing so, you will receive an additional year's warranty.

Your chronograph features a mechanical movement that is the

product of more than 300 years of traditional watchmaking. We

ask that you take care of it and are careful when making any

adjustments. In the following pages you will ﬁnd information on

how to use your watch and its functions. The functions available

depend on the model.

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In front of you is the El Primero 21 movement. It is the only

mechanical 1/100th of a second chronograph movement.

The El Primero 21 movement is a masterpiece of modern

engineering. Constructed using state-of-the-art methods and

ﬁnished using the newest technologies and materials, this

movement fulﬁls two objectives: a ﬁnish of the highest possible

quality, and optimum performance and accuracy on the wrist.

First released in 1969, the world’s most accurate series-made

chronograph entered a new era of mechanical timekeeping with

the El Primero 21 movement.

An impressive frequency of 360,000 vibrations per hour is

testament to the groundbreaking ingenuity of Zenith, and enables

precise measurement of time periods to a hundredth of a second.

The jump from tenths to hundredths of a second is a quantum leap

in terms of watchmaking performance and engineering.

For Zenith, accuracy is the absolute priority. To avoid any risk

of the chronograph affecting the accuracy of the time display,

the El Primero 21 movement is equipped with a “double-chain

structure”.

1 > EL PRIMERO 21 MOVEMENT

This means that the time display and chronograph each have

their own completely independent mechanism with its own

barrel and high frequency escapement.

For the chronograph, this oscillates at a breathtaking 50 Hz

(360,000 VpH). As standard for the El Primero, the time display

calibre oscillates at 5 Hz (36,000 VpH).

Key features

El Primero 21 (Calibre 9004)

Diameter: 32.80 mm (14 ¼)

Thickness: 7.90 mm

Number of components: 293

Number of jewels: 53

2 barrels:

> Watch power reserve: 50 hours

Frequency: 36,000 VpH (5 Hz)

> Chronograph power reserve: 50 minutes

Frequency: 360,000 VpH (50 Hz)

Unidirectional automatic winding for the watch and manual winding for

the chronograph.

Functions:

> Hours, minutes and seconds

> 1/100th of a second central chronograph

30-minute counter at 3 o'clock

60-second counter at 6 o'clock

Chronograph power reserve at 12 o'clock

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Your watch is ﬁtted with an automatic mechanical movement. The

movement is wound via the crown or the effect of the oscillating

weight. Winding via the oscillating weight takes place when the

watch is on your wrist.

When your watch has stopped

The crown must be in the position 0, meaning it should be

pressed against the case.

With the watch in your hand, turn the crown counter-clockwise.

Turn the crown 72 times to fully wind the watch. The barrel that

contains the mainspring has now been wound. In order for the

automatic winding to work properly, the watch must be worn

for at least 12 hours per day, for several days. Not wearing the

watch enough causes it to stop.

2 > WINDING THE WATCH

If you do not wear your watch during the night, turn the crown a

few times the following morning before you put it on.

Having been wound, the power reserve of your watch is

around 50 hours, but this does not appear on the dial. Only the

chronograph power reserve appears on the dial of your watch.

CHRONOMETER CERTIFICATION

The El Primero 9004 movement has been certified as a

chronometer by TIMELAB in Geneva. It has been tested and

successfully meets the requirements set by the ISO3159

standard.

A chronometer is a device that measures time to the highest

accuracy, and can be adjusted to different positions and under

a range of temperatures.

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3 > WINDING THE CHRONOGRAPH

Alongside the double-chain structure of the calibre, and the

remarkable accuracy this ensures, the El Primero 21 movement

boasts two other technical innovations: a new, patented start/

stop/reset mechanism composed of three heart pieces, and an

exclusive starter mechanism which ensures reliable operation

under all circumstances, and allows the chronograph second,

tenths and hundredths displays to be simultaneously reset.

Procedure

The crown must be in the 0 position, meaning that it should be

pressed against the case.

With the watch in your hand, turn the crown clockwise until the

hand of the chronograph power reserve is fully wound (around

25 turns). The barrel that contains the mainspring has now been

wound.

Fully wound, the chronograph power reserve is around

50 minutes. This is displayed by the hand located under the

Zenith logo.

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4 > SETTING THE TIME

Position 0: winding position

In this position you can manually wind your chronograph

movement and watch by turning the crown. Pull the crown out

a notch to change to position (1).

Position 1: correcting the time

To correct the time, turn the crown in the required direction.

Do not forget to return the crown to position (0).

(0) (1)

5 > TIMEKEEPING FUNCTION

Switching it on/off: a single press of the push-button (A)

switches the timekeeping function on, pressing it again will

switch it off.Reviving the timekeeping function: pressing the

push-button (A) again will revive the timekeeping function.

Resetting the chronograph: Once the chronograph has

stopped, one ﬁrm press on the push-button (C) will send the

hand of the chronograph back and the totalisers back to zero.

Warning: Before switching the timekeeping function on, the

hands of the chronograph must be reset. If necessary, reset

using the push-button (C).

(A)

(B)

(C)

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6 > ZENITH'S INTERNATIONAL WARRANTY

Zenith watches are the product of our Manufacture and are

high-precision, high-tech products. Before your watch leaves

the Manufacture, it is subjected to numerous stringent quality

checks. However, should there be any manufacturing faults,

an international warranty means your watch is covered for two

years starting from the date of purchase.

Sign up on our website, www.zenith-watches.com, to receive an

additional year's warranty. This warranty is observed by service

centres approved by Zenith worldwide if the following conditions

are observed:

> The watch has been purchased from an ofﬁcial dealer as

approved by Zenith; your name, address, the date of purchase

and the watch reference are clearly detailed on the warranty

card.

> Your watch is worn in normal conditions and maintained in

accordance with Zenith's recommended care instructions and

has not been subjected to improper handling.

> The warranty card, the only valid proof of purchase, must

be sent along with your watch to an authorised Zenith service

centre.

PLEASE be aware that Zenith's international warranty does not

cover normal ageing of your watch, natural wear and tear of the

leather, fabric or rubber straps, nor any scratches that may appear

on the case or sapphire crystals during use.

Your watch and its movement deserve a special kind of care:

In order to maintain their accuracy, Zenith service centres

recommend servicing your watch every 5 years.

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Zenith EL PRIMERO 21 User manual

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