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Buren 1006
Automatic · 12.5‴ · Switzerland · 1957
Dimensions
28.5 mm
Height
4.80mm
Jewels
30
Power reserve
42h
Timegrapher
Beat rate
18,000bph
Frequency
2.5Hz
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 |
Micro-Rotor
A compact rotor integrated into the plane of the movement rather than placed on top, allowing significantly thinner calibres. Pioneered by Büren (Calibre 1000, 1954) and Universal Genève (Polerouter Microtor, 1955), and later iconic in Piaget's ultra-thin movements. A hallmark of refined, slim automatic watchmaking.
|
| 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 | 12.5‴ |
|---|---|
| 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.
,
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 0.22mm |
| Further measures | Mounting Diameter (Dm): 28.15mm Spacer Washer: 0.2mm Stem height (T): 2.5mm Mounting Height (F): 2.1mm |
Origin & References
| Manufacturer | Buren Watch Company |
|---|---|
| Country | Switzerland |
| Launch year | 1957 |
| COSC certified | No |
| Signature | ca. 1960: BAA, 1001A, Dugena, 1010A, Swiss Made, 25 Jewels; Incabloc |
| US import codes |
|
Notes
Remarks: 1957-1962
first movement family with micro rotor
selfwinding gear with direction switching by a pinion floating between two huge jewels (Fig.3)
in 17-jewels variants one of these jewels substituted by polished steel disc
early samples of the Buren 1006 with signature 1001A of the predecessor
Other data: balance staff: U2490 stem: W2403 mainspring / battery: 1.00 x 9.5 x 0.095mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 25, 30
first movement family with micro rotor
selfwinding gear with direction switching by a pinion floating between two huge jewels (Fig.3)
in 17-jewels variants one of these jewels substituted by polished steel disc
early samples of the Buren 1006 with signature 1001A of the predecessor
Other data: balance staff: U2490 stem: W2403 mainspring / battery: 1.00 x 9.5 x 0.095mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 25, 30
Family
Series 1000 - 1006
1000: without second
1000A: second with friction spring
1001: without second, date
1001A: second with friction spring, date
1005: second with double third wheel
1006: second with double third wheel, date
1000A: second with friction spring
1001: without second, date
1001A: second with friction spring, date
1005: second with double third wheel
1006: second with double third wheel, date
Related calibers
Buren 1000
Buren 1000A
Buren 1001
Buren 1001A
Buren 1005
Buren 1006