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Bulova 11ANC
Manual · 11.5‴ · Switzerland · 1972
Dimensions
26 mm
Height
3.30mm
Jewels
23
Power reserve
40h
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 |
Manual
Purely mechanical movements wound by hand via the crown, which tensions the mainspring to store energy. As the spring unwinds, it drives the gear train at a controlled rate set by the escapement and balance. Typical power reserves range from 38 to 80 hours, requiring daily or near-daily winding to keep the watch running.
|
|---|---|
| Winding type |
Stem Winding (Crown)
Winding the mainspring by turning the crown attached to the stem, transmitting torque through the winding pinion. Patented by Adrien Philippe in 1842, it replaced key winding and remains the standard manual winding method for both pocket watches and wristwatches.
|
| 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.
|
| Shock protection |
KIF
A family of Swiss shock protection systems (Trior, Flector, Elastor, Duofix, Protechoc) produced by Parechoc SA, the main competitor to Incabloc. Uses a multi-point elastic spring design (typically three points in the Trior version) that excels in thinner calibres. Long favoured by Rolex (Duofix), Patek Philippe, and Audemars Piguet before each developed proprietary systems.
|
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.
|
| Hand count | 3 |
| Hand sizes | 1.40 x 0.85 x 0.20mm |
| Further measures | Mounting Diameter (Dm): 25.6mm Stem height (T): 1.8mm Mounting Height (F): 1.1mm |
Origin & References
| Manufacturer | Bulova |
|---|---|
| Country | Switzerland |
| Launch year | 1972 |
| COSC certified | No |
| Signature | 1977: N7, Bulova Watch Co, 11ANC, Swiss, 17 Jewels; Kif-Ultraflex |
Notes
Remarks: 1972-1977
indirectly driven minute allows a relatively big balance and low profile
Other data: balance staff: U3430 stem: W3344 mainspring / battery: 1.10 x 11.0 x 0.11mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 23
indirectly driven minute allows a relatively big balance and low profile
Other data: balance staff: U3430 stem: W3344 mainspring / battery: 1.10 x 11.0 x 0.11mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 23
Family
Series 11AN - 11AOCD
11AN: manual, no second
11ANAC: auto, sweep second
11ANACB: auto, sweep second, day, date
11ANACD: auto, sweep second, date
11ANC: manual, sweep second
11ANCB: manual, sweep second, day, date
11ANCD: manual, sweep second, date
quickset date:
11AO: manual, no second
11AOAC: auto, sweep second
11AOACB: auto, sweep second, day, date
11AOACD: auto, sweep second, date
11AOC: manual, sweep second
11AOCB: manual, sweep second, day, date
11AOCD: manual, sweep second, date
11ANAC: auto, sweep second
11ANACB: auto, sweep second, day, date
11ANACD: auto, sweep second, date
11ANC: manual, sweep second
11ANCB: manual, sweep second, day, date
11ANCD: manual, sweep second, date
quickset date:
11AO: manual, no second
11AOAC: auto, sweep second
11AOACB: auto, sweep second, day, date
11AOACD: auto, sweep second, date
11AOC: manual, sweep second
11AOCB: manual, sweep second, day, date
11AOCD: manual, sweep second, date
Related calibers
Bulova 11AN
Bulova 11ANAC
Bulova 11ANACB
Bulova 11ANACD
Bulova 11ANC
Bulova 11ANCB
Bulova 11ANCD
Bulova 11AO
Bulova 11AOAC
Bulova 11AOACB
Bulova 11AOACD
Bulova 11AOC
Bulova 11AOCB
Bulova 11AOCD
Compatible Parts
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