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Tissot 2571
Automatic · 11.5‴ · Switzerland · 1972
Dimensions
26 mm
Height
6.00mm
Jewels
24
Power reserve
42h
Timegrapher
Beat rate
21,600bph
Frequency
3Hz
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 | 11.5‴ |
|---|---|
| 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.
,
Day
Beyond hours and minutes, the day complication anchors wearers to their weekly schedule, providing context to our cyclical routine.
,
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 0.90 x 0.21mm |
| Further measures | Mounting Diameter (Dm): 25.6mm Stem height (T): 2.65mm Mounting Height (F): 2.05mm |
Origin & References
| Manufacturer | Tissot |
|---|---|
| Country | Switzerland |
| Launch year | 1972 |
| COSC certified | No |
| Signature | 1972: 14826305, Tissot, Swiss; Incabloc |
Notes
Remarks: 1972-1980
option: plastic bushings instead of dial screws (for monoshell cases, dial plugged)
Other data: balance staff: U2480 stem: W2696, W3106 (Seastar Seven) mainspring / battery: Zf2960-X, 1.20 x 9.0 x 0.115 x 280mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 21, 24
option: plastic bushings instead of dial screws (for monoshell cases, dial plugged)
Other data: balance staff: U2480 stem: W2696, W3106 (Seastar Seven) mainspring / battery: Zf2960-X, 1.20 x 9.0 x 0.115 x 280mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 21, 24
Family
Series 2451 (2452) - 2481
in brackets US version
2451 (2452): manual wind
2461 (2462): manual wind, date
2471 (2501): automatic
2481 (2511): automatic, date
2531 (2611): automatic, 24h, date
2541: manual wind, no second
2551 (2552): manual wind, date, no second
2571 (2591): automatic, day date
2481: automatic, digital, date
2451 (2452): manual wind
2461 (2462): manual wind, date
2471 (2501): automatic
2481 (2511): automatic, date
2531 (2611): automatic, 24h, date
2541: manual wind, no second
2551 (2552): manual wind, date, no second
2571 (2591): automatic, day date
2481: automatic, digital, date
Related calibers
Tissot 2451
Tissot 2452
Tissot 2461
Tissot 2462
Tissot 2471
Tissot 2481
Tissot 2501
Tissot 2511
Tissot 2531
Tissot 2541
Tissot 2551
Tissot 2552
Tissot 2571
Tissot 2581
Tissot 2591
Tissot 2611
Compatible Parts
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