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Omega SA 1538, 2520, 2500, 1120 Self-winding split seconds chronograph, Watch functions calibre

Models: 1120 1680 1108 1532 1538 2520 1424 2500 1530 1400

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Self-winding split seconds chronograph

CALIBRE 3600 (fig. XVII) • 3612 (fig. XVIII) Watch functions (calibre 3600)

The crown has 2 positions:

1.Normal position (wearing position): when pushed into the case, the crown ensures that the watch is water-resistant.

2.Time setting: hour – minutes – seconds. Pull the crown out to position 2. 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.

Watch functions (calibre 3612)

The crown has 3 positions:

1.Normal position (wearing position): when pushed into the case, the crown ensures that the watch is water-resistant.

2.Date setting: pull the crown out to position 2, turn the crown backwards, then push the crown back to position 1.

NOTE: the date cannot be corrected between 9pm and 12.30am.

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.

Occasional winding: if the watch has not been worn for 45 hours (cal. 3600) or 55 hours (cal. 3612) or more, wind it up with the crown in position 1.

Chronograph functions:

Pusher A: start – stop, start – stop etc.

Timing to within 1/8th of a second for up to 12 hours. Pusher B: reset (after a stop).

English

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Omega SA 1538, 2520, 2500, 1120, 1400, 1532, 1108, 1680, 1424 Self-winding split seconds chronograph, Watch functions calibre

Contents

Operating Instructions Viii Xviii Contents What are the service intervals? Special recommendationsEnvironmental protection Leather strapsAnti-reflective treatment Screw-in crownOmega International Warranty Valid for U.S.A. onlyOmega SA Rue Stämpfli 96, 2500 Bienne Omega International Warranty Above manufacturer’s warranty Calibres 1426, 1530, 1532 fig Quartz WatchCalibres 1376, 1456 fig Calibres 1424, 1538 figCalibres 1424 Time setting by pressing the correctorCalibre 4000 fig. IIbis Watch functions Quartz chronographCalibre 1270 fig Chronograph functionsSimple timing function crown in position Pusher B ResetCalibre Pusher a Start stop read timePusher a Stop to read time Pusher a Press again to restart Addition function crown in positionPusher a Start Pusher a StopManual & Self-winding watch Power reserve cal Counter at 9 o’clock small secondsCalibres 1120, 2500, 2520, 2610 fig 2627 fig. III 2300 fig Crown has 2 positions Power reserveCalibre 2201 Manual-winding Calibres 3205 fig. XV 3220 fig. Xiii 3601 Pusher B reset after a stopSelf-winding chronograph Regatta function calApnea function cal Regatta functionApnea function based on a 14 minute dive Changing the date press the corrector C at 10 o’clock Self-winding chronograph with dateCalibre 3304 fig Calibre 1151 figSelf-winding split seconds chronograph Watch functions calibreSelf-winding split seconds chronograph Chronograph functions with split secondsManual-winding chronograph Calibres 1861, 1863 fig. XV 1866, 3604 figCalibre 1866-Date and moon phase correction Date setting small counter at 12 oclock press corrector CCalibre 1680 fig Setting the hands minutes and secondsPerpetual calendar ThermocompensationDisplay and correction of the month Display and correction of the yearly cycle Self-winding GMT & GMT Chronograph Calibres 1128 fig. VI 2628 fig 3603 figSelf-winding GMT & GMT Chronograph Bi-directional turning bezel calibre Coincide with a given time signalSecond Time Zone calibre 1128, fig Second Time Zone calibre 2628, fig. VII, calibre 3603, figDays Position Temperature 23C Days 14,15 Position Temperature 23COther Omega mechanical watches Precision tolerances32 -1 to +6 seconds per day Quartz watchesHelium escape valve fig Helium escape valvePressure is gradually increased to How to use the helium escape valve fig Not functional, since it is screwedTachymetric scale Using the tachymetric scaleExample calculating the speed of a car Rubber strap Rubber strap Snap-fastening foldover clasps Opening Adjusting the lengthFoldover clasps ClosingFoldover clasps with pushers Opening fig Adjusting the length figClosing fig Pictograms