If you’ve searched “automatic watch running fast”, “automatic watch running slow”, “why is my mechanical watch losing time”, or “automatic watch accuracy problems”, it’s important to understand that mechanical watches don’t behave exactly like quartz watches.
Small variations in timekeeping are inherent to mechanical movements. However, understanding what influences those variations can help you determine when the behavior is normal and when professional inspection may be worthwhile.
Why Don’t Automatic Watches Keep Perfect Time?
An automatic movement relies on mechanical components rather than an electronic quartz oscillator.
Inside the movement, components work together continuously to regulate the release of energy from the mainspring.
Because this process is mechanical, performance can be influenced by:
- movement design
- position
- temperature
- state of wind
- magnetism
- movement condition
Some variation is therefore expected.
What Does “Seconds Per Day” Mean?
Mechanical watch accuracy is commonly discussed in terms of seconds gained or lost per day.
For example, if a watch consistently gains a small amount of time every 24 hours, it is described as running fast.
If it falls behind the reference time, it is running slow.
The acceptable range depends on the specific movement and manufacturer specification.
Why Position Can Affect Accuracy
Mechanical movements can perform slightly differently depending on their orientation.
For example, a watch may behave differently when it is:
- dial up
- dial down
- crown up
- crown down
Gravity interacts with the movement differently in each position.
This is one reason mechanical accuracy can vary between owners even when they use the same movement.
Can Magnetism Make a Watch Run Differently?
Magnetic fields can affect some mechanical watch components.
Potential everyday sources can include certain:
- electronic accessories
- magnetic closures
- speakers
- other strong magnets
If a watch suddenly begins gaining or losing substantially more time than it normally does, professional inspection can help identify the cause.
Does Power Reserve Affect Performance?
A mechanical movement’s behavior can vary depending on its state of wind and movement design.
For consistent observations, it’s helpful to evaluate the watch under similar wearing conditions rather than comparing one isolated measurement.
How Should You Measure Automatic Watch Accuracy?
If you want to understand your watch’s performance, consistency matters.
You can compare the watch against a reliable reference time over multiple days and record whether it gains or loses time.
For example, you might record:
- starting difference
- difference after 24 hours
- difference after several days
This gives you a better picture than checking it randomly throughout one afternoon.
Don’t Judge the Watch From One Day
One day’s result doesn’t necessarily represent long-term performance.
Daily activity, resting position, power reserve, and other factors can change the result.
Looking at an average over several days provides more useful information.
When Should You Be Concerned?
Check the manufacturer’s stated accuracy specification for your particular movement.
Professional inspection may be appropriate if the watch:
- suddenly changes significantly
- repeatedly stops despite adequate winding
- shows substantially abnormal performance
- develops unusual crown or winding behavior
Avoid attempting internal regulation unless you’re properly trained, as mechanical movements contain delicate components.
Can an Automatic Watch Be Regulated?
Many mechanical movements can be professionally adjusted or regulated.
Regulation can improve rate performance when the movement is otherwise functioning correctly.
However, regulation isn’t necessarily the solution to every accuracy issue. A watchmaker may first need to determine whether servicing, demagnetization, or another correction is appropriate.
Automatic vs Quartz Accuracy
If absolute accuracy is your main priority, quartz generally offers an advantage.
Automatic watches are appreciated for a different reason: they provide a mechanical connection to traditional watchmaking.
Many enthusiasts happily accept small variations in exchange for:
- mechanical engineering
- traditional craftsmanship
- automatic winding
- collector appeal
Specht & Sohne Automatic Watch Ownership
Specht & Sohne automatic watches are designed to provide an engaging mechanical ownership experience.
Owners should refer to the specifications of their particular model when evaluating accuracy because different movements can have different expected tolerances.
Final Thoughts
An automatic watch gaining or losing some time doesn’t automatically mean something is wrong.
Mechanical movements naturally operate within tolerances rather than maintaining perfect electronic precision.
The key is consistency.
Learn the expected specification for your movement, observe its performance over several days, and seek professional inspection if its behavior changes significantly.