Perpetual calendar

CALIBRE 1680 (fig. V)

The particularity of the Gregorian calendar is that one day (29th February) is added to the year every four years to compensate for the length of the solar year, which is 365.242192 days, or almost 365 1/4 days. Such years are called leap years and their number (e.g. 1996) is divis- ible by 4.

As the compensation of one day every four years is too much, every 100 years (2100, 2200, …) the year is not a leap year, even though it is divisible by four. However, even this is not totally sufficient, since it leaves an error of one day every 400 years. Therefore, if the number of the year is divisible by 400 it is a leap year, as was the case with the year 2000. Because of this, the perpetual calendar of your watch is set to function correctly until 2100.

Thermocompensation

This movement is 10 times more precise than a conven- tional quartz movement thanks to an electronic module that compensates for the effects of temperature on the movement’s operation.

The crown has 3 positions:

Watch functions:

1.1.Neutral position 1, normal when the watch is worn: in this position, the crown ensures that the watch is water-resistant.

1.2.Setting the hands: minutes and seconds.

Pull the crown out to position 3 when the second hand is at 12 o’clock. The seconds hand will stop. Turn the crown forwards or backwards to set the minute hand.

Push the crown back into position 1 to coincide with a given time.

English

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NOTE: To avoid inadvertently changing the date when setting the time, it is important to always follow point 1.2 and then point 1.3.

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Omega SA 1108, 2520, 2500 Perpetual calendar, Calibre 1680 fig, Thermocompensation, Setting the hands minutes and seconds
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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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