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Omega 561
Automatic · 12.59‴ · Switzerland · 1958
Dimensions
28.4 mm
Height
5.00mm
Jewels
24
Power reserve
50h
Timegrapher
Beat rate
19,800bph
Frequency
2.75Hz
Lift angle
49°
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Movement
| Movement type |
Automatic
Mechanical movements fitted with an oscillating rotor that winds the mainspring through the wearer's natural motion. Invented by Abraham-Louis Perrelet around 1777 for pocket watches and adapted to the wristwatch by John Harwood in 1923, it combines traditional craftsmanship with everyday convenience.
|
|---|---|
| Winding type |
Automatic (Rotor-Driven)
Self-winding via a rotor whose motion winds the mainspring through a transmission gear train. The specific rotor configuration (central, micro, peripheral, bumper) is catalogued separately under Rotor Type. Standard on the vast majority of mechanical wristwatches since the mid-20th century.
|
| Setting type |
Stem Set (Crown Pull)
The dominant modern system: pulling the crown out to a setting position engages the hand-setting mechanism. Introduced in the late 19th century and refined into multi-position crowns (date, time, GMT). Used in virtually all modern wristwatches and most 20th-century pocket watches.
|
| Escapement type |
Swiss Lever
The undisputed standard of modern mechanical watchmaking. Through an elegant interplay between escape wheel, pallet fork, and balance, it delivers reliable impulses with the safety of 'draw' to keep the lever locked. Refined since the 18th century, it powers almost every quality mechanical wristwatch made today.
|
| Control type |
Balance Wheel
The heart of mechanical timepieces, the balance wheel is an oscillating component that, together with the hairspring, forms a harmonic oscillator regulating the gear train's pace. Its steady back-and-forth motion ensures the even release of energy from the mainspring, governing the watch's accuracy.
|
| Regulator type |
Pinned Regulator (or Index Regulator)
The most traditional regulator, consisting of a movable index pointer fitted with two curb pins (or a pin and a boot) that embrace the hairspring. Sliding the index along its scale changes the spring's active length, adjusting the rate. Simple, reliable, and easy to service, it remains the workhorse standard across countless mechanical movements.
|
| Rotor type |
Central Rotor
The most common automatic winding rotor, mounted on the central axis of the movement and rotating a full 360°. Industrialized by Rolex with the Perpetual system in 1931 and refined throughout the 20th century, it offers excellent winding efficiency and remains the de facto standard for automatic wristwatches, whether winding in one or both directions.
|
| Shock protection |
Incabloc
The most famous and widely used shock protection system in horology. Invented in 1934 by Georges Braunschweig and Fritz Marti at Universal Escapements (La Chaux-de-Fonds), it employs a lyre-shaped spring holding the jewel setting, allowing it to shift under impact and return to position. Adopted by countless Swiss makers across the 20th century.
|
Specifications
| Lignes | 12.59‴ |
|---|---|
| Shape |
Round
It is the most common form that we can find.
|
| Complications |
Sweep Second
Contrary to the ticking motion of quartz watches, the sweep second hand in mechanical watches moves smoothly around the dial, offering a visual representation of time flowing continuously. This has become synonymous with the precision and craft of mechanical horology.
,
Date
An essential for many, the date display reminds wearers of their daily commitments, connecting the abstract concept of time to tangible daily events.
|
| Hand count | 3 |
| Hand sizes | 1.50 x 0.80 x 0.18mm |
| Further measures | Mounting Diameter (Dm): 27.9mm Stem height (T): 2.15mm Mounting Height (F): 1.75mm |
Origin & References
| Manufacturer | Omega |
|---|---|
| Country | Switzerland |
| Launch year | 1958 |
| COSC certified | Yes |
| Signature | 1961: 17218284, Omega Watch Co Swiss, Adjusted 5 Positions and Temperature, 24 Jewels; Incabloc |
| US import codes |
Notes
Remarks: 1958-1967
1958-1969, 5800000 (550...565)
chronometer
Other data: balance staff: U2769 stem: W2790 balance staff ronda: 4944 (12,25) stem ronda: 1361 (12,25)
1958-1969, 5800000 (550...565)
chronometer
Other data: balance staff: U2769 stem: W2790 balance staff ronda: 4944 (12,25) stem ronda: 1361 (12,25)
Family
Series 550 - 613
automatic:
550: 17 jewels
551: 24 jewels, chronometer
552: 24 jewels
560: 17 jewels, date
561: 24 jewels, date, chronometer
562: 24 jewels, date
563: 17 jewels, quickset date
564: 24 jewels, quickset date, chronometer
565: 24 jewels, quickset date
750: 17 jewels, day, quickset date
751: 24 jewels, day, quickset date, chronometer
752: 24 jewels, day, quickset date
manual wind:
600: Reed's regulator
601: excenter regulator
602: excenter regulator, chronometer
610: Reed's regulator, date
611: excenter regulator, date
613: excenter regulator, quickset date
550: 17 jewels
551: 24 jewels, chronometer
552: 24 jewels
560: 17 jewels, date
561: 24 jewels, date, chronometer
562: 24 jewels, date
563: 17 jewels, quickset date
564: 24 jewels, quickset date, chronometer
565: 24 jewels, quickset date
750: 17 jewels, day, quickset date
751: 24 jewels, day, quickset date, chronometer
752: 24 jewels, day, quickset date
manual wind:
600: Reed's regulator
601: excenter regulator
602: excenter regulator, chronometer
610: Reed's regulator, date
611: excenter regulator, date
613: excenter regulator, quickset date
Related calibers
Omega 550
Omega 551
Omega 552
Omega 560
Omega 561
Omega 562
Omega 563
Omega 564
Omega 565
Omega 600
Omega 601
Omega 602
Omega 610
Omega 611
Omega 613
Omega 750
Omega 751
Omega 752
Compatible Parts
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