Automatic watches
Automatic vs quartz
Quartz wins on accuracy and cost. Automatic wins on being repairable forever. Everything else is preference — here are the numbers.
By Sawyer V. · Published
The short answer
Quartz is far more accurate, needs no servicing interval and costs a fraction to run. An automatic is less accurate and needs servicing about every three years at $176-296, but can be rebuilt indefinitely. Neither is better; they fail in different ways.
This is the first decision, and it gets argued badly. Enthusiast writing treats quartz as a downgrade, and the specification sheets treat automatics as a luxury. Neither framing survives the numbers.
The comparison, on published figures
| Automatic | Quartz | Solar quartz | |
|---|---|---|---|
| Accuracy | Seconds per day. Seiko specifies the 6R at +25/-15 sec/day | Seconds per month | Seiko's V192: ±15 sec/month |
| Power | Your wrist. 40-80 hours off it | A battery, every few years | Light. No battery, ever |
| Servicing interval | About every 3 years (Seiko's recommendation) | None published | None published |
| Cost per service | $176-296 at Seiko; $210 at Tissot | $100-135 at Seiko | $163 at Seiko |
| 20-year service cost | $1,056 on a 4R36; $1,776 on a 6R35 | Battery changes only | Roughly $326 on two services |
| Rebuildable indefinitely | Yes | No — the module is replaced | No — the module is replaced |
| Stops if unworn | Yes, after 40-80 hours | No | No |
The case for automatic
- It can always be rebuilt. Every part in a mechanical movement can be cleaned, lubricated or replaced. There is no component that ends the watch, as long as parts exist — which is why the caliber matters more than the case.
- No battery, no electronics. Nothing to leak, nothing to degrade in storage, nothing that becomes obsolete.
- It is genuinely interesting. A mechanical watch is a machine doing something visible and comprehensible. That is not a specification and it is the honest reason most people buy one.
- Parts availability is excellent at the entry level. The Seiko 4R and NH families are made in enormous volume, which is the strongest possible guarantee of long-term serviceability.
The case for quartz
- Accuracy in a different league. Seconds a month against seconds a day. If you have ever been irritated by resetting a watch, this is the fix.
- No servicing interval. Nobody publishes one, because there is not one. Batteries and eventually a module.
- A fraction of the running cost. Roughly $326 over twenty years on a solar watch against $1,056 for the cheapest mechanical here.
- It does not stop. Put it in a drawer for a year and it is still running and still right.
- Solar removes the last objection. No battery changes at all, and Citizen's Eco-Drive and Seiko's solar calibers carry the same warranties as their mechanical watches — five years at Citizen.
What quartz does not do
It cannot be rebuilt. When a quartz module finally fails — and they run for a very long time — it is replaced with a new module rather than repaired. For most owners that is a non-issue, and for someone whose entire objective is an object that can be brought back to life forever, it is the whole argument.
That is the honest boundary between them, and it is much narrower than the way this debate normally gets conducted.
The accuracy question, in perspective
A mechanical watch losing 10 seconds a day is out by about five minutes a month. A quartz watch out by 15 seconds a month is out by three minutes a year. That is a real difference, and whether it matters depends entirely on whether you enjoy the small ritual of correcting a watch or find it irritating.
Nobody at these prices is relying on a wristwatch for accuracy. Your phone is. So this is a preference question dressed as a technical one, and it is fine to answer it on preference.
How to decide
| If this describes you | Buy |
|---|---|
| I want a machine I can keep repairing forever | Automatic — and buy one whose caliber is named |
| I want the lowest total cost and effort | Solar quartz |
| I find resetting a watch irritating | Quartz |
| I want to look at the movement | Automatic, with a display case back |
| The watch will sit unworn for weeks | Quartz, or an 80-hour automatic |
| I want the least chance of an unexpected bill | Solar quartz — nobody publishes a service interval |
If you are still weighing it, the twenty-year arithmetic in what a watch costs to keep is the fastest way to settle it — and the number surprises most people.
Questions people actually ask
Is an automatic watch better than quartz?
Not better — different. Automatics can be rebuilt indefinitely and need servicing every three years at $176-296. Quartz is far more accurate, has no servicing interval, and is replaced rather than repaired at end of life.
How much more accurate is quartz?
Roughly an order of magnitude. Quartz is specified in seconds per month — Seiko's V192 solar at ±15 seconds monthly — while mechanical movements are specified in seconds per day, with Seiko's 6R at +25 to -15.
Do automatic watches last longer than quartz?
They can be kept running longer, because every part can be replaced. Whether they last longer in practice depends entirely on whether they get serviced — an unserviced automatic will very likely be beaten by a solar quartz that needs nothing.
Which is cheaper to own?
Quartz, by a wide margin. Twenty years of three-yearly overhauls is $1,056 on Seiko's cheapest published mechanical rate, against roughly $326 for a solar watch on two services.
Can a quartz watch last a lifetime?
A solar quartz can run for decades with no winding and no battery changes, and will very likely outlast an unserviced mechanical. The difference is that it is eventually replaced rather than rebuilt.
Sources
Every specification and figure on this page came from one of these documents. Where a manufacturer does not publish something, the page says so rather than filling the gap.
Read next
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