Omega SA 2520, 2500, 1538, 1120, 1400, 1532, 1108, 1680, 1424, 1530 Self-winding GMT & GMT Chronograph

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Self-winding GMT & GMT Chronograph

Occasional winding: if the watch has not been worn for 44 hours (cal. 1128, 2628) or 55 hours (cal. 3603) or more, wind it up with the crown in position 1.

2.Setting the time zone: pull the crown out to position 2 and turn it. Only the hour hand moves (clockwise or anticlockwise), without affecting the precision of the minutes or seconds. If the hand moves past midnight, the date changes automatically. Push the crown back to position 1.

Setting the date: pull the crown out to position 2, turn it forwards or backwards to change the date each time the hour hand passes midnight. The date moves forwards (or backwards) one day. Repeat until the required date is obtained. Push the crown back to position 1.

Synchronisation of the hour hand and the “24-hour” hand (calibre 1128, fig. VI)

The triangle on the rotating bezel must point to 12 o’clock on the dial.

Pull the crown out to position 2 and turn it to syn- chronise the hour hand with the time indicated by the “24-hour” hand on the 24-hour scale on the rotating bezel. Make sure you set the hour hand in the correct half of the day! Push the crown back to position 1.

Synchronisation of the hour hand and the “24-hour” hand (calibre 2628, fig. VII, calibre 3603, fig. XX)

Pull the crown out to position 2 and turn it to syn- chronise the hour hand with the time indicated by the “24-hour” hand on the 24-hour scale in the centre of the dial. Make sure you set the hour hand in the cor- rect half of the day!

After synchronising the hour hand with the “24-hour” hand, you must set the local time on your watch. Push the crown back to position 1.

English

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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 figTime setting by pressing the corrector Calibres 1424Calibre 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 StopPower reserve cal Counter at 9 o’clock small seconds Manual & Self-winding watchCalibres 1120, 2500, 2520, 2610 fig 2627 fig. III 2300 fig Power reserve Crown has 2 positionsCalibre 2201 Manual-winding Calibres 3205 fig. XV 3220 fig. Xiii 3601 Pusher B reset after a stopSelf-winding chronograph Regatta function calRegatta function Apnea function calApnea 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 C Calibre 1680 fig Setting the hands minutes and seconds Perpetual 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 Helium escape valve figPressure is gradually increased to How to use the helium escape valve fig Not functional, since it is screwedUsing the tachymetric scale Tachymetric scaleExample calculating the speed of a car Rubber strap Rubber strap Snap-fastening foldover clasps Opening Adjusting the lengthFoldover clasps ClosingAdjusting the length fig Foldover clasps with pushers Opening figClosing fig Pictograms