At first glance at the classic mechanical chronometer many see only a beautiful accessory that hides the most complex engineering thought. The appearance of these devices consists of many elements, each of which performs a strictly defined function. The case, dial, hands and crown are just the visible part of the iceberg, behind which lies the amazing world of gears and springs.
Understanding how they work and what they look like mechanical watch, allows you not only to choose high-quality models, but also to properly care for them. Unlike quartz analogues, there is no battery, and the energy is generated manually or by the movement of the owner’s hand. It is this feature that dictates the presence of specific design elements that you will never see in electronic gadgets.
In this article we will take a detailed look at the anatomy of the mechanics, look under the back cover and figure out why some models cost a fortune. You will learn to distinguish between types of combat, understand the purpose of complications and evaluate the quality of the mechanism. Horology is the science of time, and it requires careful attention to detail.
Appearance: body and protective elements
The first thing that catches your eye upon inspection is body hours. It serves not just as a frame for the dial, but as a sealed storage unit for the watch mechanism. The most common materials used are stainless steel, gold, platinum or titanium. The surface of the case can be polished to a mirror finish or matte, treated with satin polishing.
The key element of protection is glass. Modern models most often use sapphire glass, which is almost impossible to scratch. Less expensive options are equipped with mineral glass or acrylic (plexiglass), which is easier to polish but easier to damage. Sapphire crystal often has an anti-reflective coating, which makes it visually almost invisible from certain angles.
On the right side of the case (usually at 3 o'clock) is located crown. It is used to wind the spring and set the time. Waterproof models often have a screw-type head that requires unscrewing before use. The side parts of the case are called lugs; a strap or bracelet is attached to them.
⚠️ Caution: Never try to turn the screw crown while it is screwed in tightly - this may strip the threads and compromise the seal of the case.
The back cover can be solid (solid caseback) or transparent (exhibition caseback). The transparent sapphire cover allows you to observe the operation of the mechanism, which is highly valued by collectors. A blind cover better protects the mechanism from dust and shock, but hides the beauty of the engineering.
The face of time: the dial and its elements
The dial is the “face” of the watch, from which information is read. It can be made of brass, enamel, mother of pearl or even meteorite. The coating is often called guilloche when a complex pattern is embossed into the metal. This is where the watch markers, brand logo and water resistance inscriptions are located.
The main indicators are the hour, minute and second hands. The second hand can be central or placed on a separate dial (small second). In some models, for example Patek Philippe or Vacheron Constantin, you can find retrograde arrows that move in an arc and sharply return to the beginning.
Indicators may include the date, day of the week, moon phase or power reserve. The date window is usually located at 3 o'clock, but can be shifted to 4:30 or 6 o'clock. The presence of a luminescent coating (Super-LumiNova) on the hands and markers allows you to read the time in the dark.
When purchasing a watch with a guilloche dial, inspect it under a magnifying glass: the lines of the pattern should converge in the center without breaks or blurring.
Anatomy of the mechanism: what's inside the case
If we remove the back cover, we will see mechanism (caliber). This is the heart of the watch, consisting of hundreds of parts. The basis is platinum - a metal plate on which all components are fixed. Axles are additional plates that press against gears and axles.
The main engine is the mainspring, hidden in the drum. When winding the watch, the spring twists, accumulating energy. In automatic models (self-winding) there is an additional element - a rotor. This is a semicircular weight made of heavy metal, which rotates when the hand moves and drives a spring through a gear system.
Energy is transferred through the wheel system. Gears transmit torque from the drum to the trigger mechanism. All gear axes rotate on stones (rubies) that minimize friction. The number of jewels is often indicated on the dial and indicates the complexity of the mechanism.
Why are rubies needed in the mechanism?
Rubies (synthetic sapphires) are used as bearings for gear axles. They have high hardness and a low coefficient of friction, which ensures durability and precision, preventing rapid wear of metal parts.
Stroke control: balance and spiral
The most important component determining accuracy is trigger (escapement). It converts the continuous energy of the spring into dosed impulses. The key element here is the balancer - a wheel that performs oscillatory movements.
A hair (spiral) is attached to the balancer. This thin thread unwinds and twists, setting the rhythm. The vibration frequency is usually 18,000, 21,600 or 28,800 vibrations per hour (vph). The higher the frequency, the smoother the second hand moves and the more accurate the movement, but the higher the wear.
In modern expensive mechanisms, such as Rolex Parachrom or Omega Co-Axial, non-magnetic alloys and silicon spirals are used. This protects the watch from the influence of magnetic fields, which can disrupt its accuracy in a matter of minutes.
| Component | Function | Material |
|---|---|---|
| Balancer | Adjusting the oscillation frequency | Beryllium bronze |
| hair | Return force for balancer | Nivarox Alloy/Silicon |
| Anchor | Transferring impulse to balancer | Steel/Silicon |
| escape wheel | Interaction with the anchor | Steel |
Plant types and additional features
Mechanical watches are divided into two main types based on the winding method: manual and automatic. In models with manual winding (hand-winding) the owner needs to regularly turn the head to wind the spring. This is a classic option, loved by purists for its thinness and lack of a rotor.
Automatic watches are wound by hand movement. If you don't use this watch for several days, it will stop working. For convenience, many models are equipped with a “hack second” function (the second hand stops when the crown is pulled out) and quick date adjustment.
☑️ Checking the condition of the mechanism
Complex functions, or “complications,” make a watch unique. A chronograph allows you to measure short periods of time. The GMT indicator shows the time of the second time zone. The tourbillon is a rotating escapement cage designed to compensate for the effect of gravity on vertical precision.
⚠️ Attention: Do not switch the calendar or date between 21:00 and 3:00 am, when the switching mechanism has already started working - this may lead to breakage of the gear teeth.
Visual signs of quality workmanship
How to distinguish high-quality mechanics from cheap imitation? Pay attention to the processing of the edges of the parts. In good hours (High Watchmaking) All corners of bridges and plates are rounded and polished by hand. This is called English.
Surfaces are often decorated with perlage (graining) or Geneva stripes (Côtes de Genève). Screws should have polished splines and heads, often with a blue heat treatment (blue finish). The automatic winding rotor is also carefully decorated.
The hands in expensive models are not just printed or cut out, they have complex geometry and chamfers. For example, “Dauphine” or “Alpha” hands must have clear edges. The luminescent coating should be applied evenly, without going beyond the edges.
True craftsmanship is evident in the finishing of details that are invisible to the eye: the inner corners of bridges and hidden surfaces in a luxury watchmaker are polished just as carefully as the outer ones.
Frequently asked questions (FAQ)
Why can mechanical watches be fast or slow?
Accuracy depends on temperature, watch position (dial up, crown down), magnetization and lubrication conditions. Even a certified chronometer can have an error of -4 to +6 seconds per day.
How often should you wind a manual watch?
It is best to wind your watch at the same time, preferably in the morning, by removing it from your hand. This will ensure a stable amplitude of oscillations of the balancer during an active day. The full power reserve is usually between 38 and 80 hours.
Is it harmful to the mechanism if the watch stops completely?
No, stopping completely does not harm the mechanism. On the contrary, oil is not consumed while the mechanism is standing. However, if the watch has been sitting for a long time, it is recommended to let it sit in a horizontal position before wearing it so that the lubricant is distributed.
What is power reserve and what does it look like visually?
The power reserve is the operating time of the watch from fully winding to stopping. Visually, it can be displayed on the dial with a special indicator (power reserve), similar to a fuel gauge in a car, showing how many hours are left before winding.