Omega SA 1538, 2520, 2500, 1120 Days Position Temperature 23C, Days 14,15 Position Temperature 23C

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Precision tolerances

Omega mechanical watches with a certified chrono- meter movement

Omega watches bearing the chronometer inscription (in accordance with the certificate issued by your autho- rised Omega retailer) are high-precision timepieces that have passed the precision tests of the Official Swiss Chronometer Testing Institute (Contrôle Officiel Suisse des Chronomètres, COSC).

This neutral and independent body individually tests each movement for 360 consecutive hours, during which it is placed in the five common wrist positions and exposed to three different temperatures.

Days

1,2

3,4

5,6

7,8

9,10

Position

 

 

 

 

 

Temperature

23°C

23°C

23°C

23°C

23°C

Days

11

12

13

14,15

 

Position

 

 

 

 

 

Temperature

8°C

23°C

38°C

23°C

 

To earn the title of chronometer, the mechanical move- ment’s average daily variation in rate must be between –4/+6 seconds per day, or a precision of 99.99%, the highest precision attainable by a mechanical movement.

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 Quartz Watch Calibres 1376, 1456 figCalibres 1426, 1530, 1532 fig Calibres 1424, 1538 figCalibre 4000 fig. IIbis Time setting by pressing the correctorCalibres 1424 Quartz chronograph Calibre 1270 figWatch functions Chronograph functionsPusher B Reset CalibreSimple timing function crown in position Pusher a Start stop read timeAddition function crown in position Pusher a StartPusher a Stop to read time Pusher a Press again to restart Pusher a StopCalibres 1120, 2500, 2520, 2610 fig 2627 fig. III 2300 fig Power reserve cal Counter at 9 o’clock small secondsManual & Self-winding watch Calibre 2201 Manual-winding Power reserveCrown has 2 positions Pusher B reset after a stop Self-winding chronographCalibres 3205 fig. XV 3220 fig. Xiii 3601 Regatta function calApnea function based on a 14 minute dive Regatta functionApnea function cal Self-winding chronograph with date Calibre 3304 figChanging the date press the corrector C at 10 o’clock 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 CSetting the hands minutes and seconds Perpetual calendarCalibre 1680 fig 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 Coincide with a given time signal Second Time Zone calibre 1128, figBi-directional turning bezel calibre Second Time Zone calibre 2628, fig. VII, calibre 3603, figDays Position Temperature 23C Days 14,15 Position Temperature 23CPrecision tolerances 32 -1 to +6 seconds per dayOther Omega mechanical watches Quartz watchesPressure is gradually increased to Helium escape valveHelium escape valve fig How to use the helium escape valve fig Not functional, since it is screwedExample calculating the speed of a car Using the tachymetric scaleTachymetric scale Rubber strap Rubber strap Adjusting the length Foldover claspsSnap-fastening foldover clasps Opening ClosingClosing fig Adjusting the length figFoldover clasps with pushers Opening fig Pictograms

1120, 1680, 1108, 1532, 1538 specifications

Omega SA, a renowned Swiss luxury watch manufacturer, is celebrated for its precision timepieces, with a history spanning over 170 years. Among its notable innovations are the Omega SA 1400, 1530, 2500, 1424, and 2520 models, each representing a fusion of cutting-edge technology, meticulous craftsmanship, and timeless design.

The Omega SA 1400 is recognized for its automatic movement that embodies reliability and robustness. This model features a classic design bolstered by a stainless steel case, ensuring durability while maintaining a sophisticated appearance. The 1400 utilizes an intricate balance wheel, which enhances its accuracy and provides a power reserve that withstands the test of time.

The Omega SA 1530, meanwhile, is a standout for its pioneering co-axial escapement technology. This innovative mechanism, developed by George Daniels in the 1970s, offers greater precision and stability, as well as reduced friction between the moving parts. The 1530’s dial boasts a clean aesthetic, accented by elegant hour markers and hands, making it suitable for both formal and casual settings.

Next, the Omega SA 2500 model highlights a blend of heritage and modern aesthetics. It features a distinctive skeletonized movement that allows wearers to appreciate the intricate workings of the watch. This model is equipped with anti-magnetic technology, protecting its inner mechanisms from electromagnetic fields, thus ensuring its continued accuracy in everyday life.

The Omega SA 1424 is particularly notable for its bold design and robust construction. It is often viewed as a new generation of dive watches, equipped with luminous markers for visibility in low-light conditions. The water resistance of the 1424 ensures it can withstand the rigors of underwater exploration, making it an ideal companion for adventure enthusiasts.

Lastly, the Omega SA 2520 model stands out with its sophisticated chronograph function. This timepiece is optimized for precision timing with additional features such as a tachymetric scale, allowing users to measure speed over distances. The 2520 boasts a dynamic design, often adorned with a striking bezel and a combination of polished and brushed finishes, ensuring it remains a statement piece on any wrist.

In summation, Omega SA’s 1400, 1530, 2500, 1424, and 2520 models exemplify the brand’s commitment to excellence in horology. Each of these timepieces showcases unique features and innovations while retaining the classic elegance that Omega is known for, making them coveted additions to any watch collection.
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