Omega SPEEDMASTER MOONWATCH User manual

SPEEDMASTER

MOONWATCH OMEGA CO-AXIAL CHRONOGRAPH 44.25 MM

Steel on steel

Caliber

9300 311.30.44.51.01.002

VCo-Axial escapement

]Si14 silicon balance spring

lAutomatic

UChronometer

iTime zone function

ZTachymeter

oSapphire crystal

tAnti-reﬂective treatment on both sides

DSapphire crystal case back

TWater-Resistant to a relative pressure of 10 bar

(100 metres/330 feet)

WATCH FUNCTIONS

The crown has 3 positions:

1. Normal position (wearing position): when the crown is positioned against the

case, the crown ensures that the watch is water-resistant.

Occasional winding: if the watch has not been worn for 60 hours or more, wind it

up with the crown in position 1.

2. Setting the time zone and correcting the date: pull the crown out to position

2. Turn the crown forwards or backwards, and the hour hand will move forwards or

backwards by 1-hour intervals. By passing the hour hand over midnight, the date

can be changed forwards or backwards. Push the crown back to position 1.

NB: when changing the time zone backwards, it is necessary to move the hour

hand back past 7 pm to ensure the date changes.

3. Time setting: hours – minutes – seconds. Pull the crown out to position 3. The

seconds hand will stop. Turn the crown forwards or backwards. Synchronise the

seconds by pushing the crown back to position 1 to coincide with a given time

signal.

Timing to 1/8 of a second for up to 12 hours.

1 / 2

TACHYMETRIC SCALES

The desired information is read between the central seconds hand of the

chronograph and the corresponding scale, over a maximum duration of 60

seconds.

Example: calculating the speed of a car.

Record the time the car takes to cover a distance of 1 kilometre. Read off the

tachymetric scale the speed indicated by the central seconds hand. In this case,

the car is travelling at 120 km/h.

2 / 2

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