Magnetized Watch? Test It and Fix It in Minutes

Magnetized Watches: Symptoms, Testing and Demagnetizing

Suddenly gaining 30+ seconds a day? Before blaming the movement, check the most common and cheapest-to-fix culprit: magnetization. Speakers, laptop coolers, magnetic clasps on bags, phone cases — modern life is full of magnets, and hairsprings hate them.

Why Magnetism Speeds Watches Up

The hairspring is a fine steel alloy coil. When magnetized, its coils attract each other, effectively shortening the spring — which makes the balance oscillate faster. Faster oscillation = the watch runs fast. The classic signature:

• Runs dramatically fast (tens of seconds to minutes per day), often inconsistently
• Rate changes by position more than usual
• Started after contact with a new bag clasp, speaker, magnetic tool tray, or laptop

Testing Without Instruments

1. Compare against a known-good reference for 24h to confirm the fast rate
2. The compass test: a demagnetized watch doesn't deflect a compass needle held near it. If your watch swings a compass, it's magnetized

A timegrapher shows it too — amplitude looks normal but rate is high and unstable.

Demagnetizing: The Two-Minute Fix

1. Get a demaagnetizer ($10–20) — a simple coil you plug in
2. Press and hold the button; slowly pass the movement only (or whole watch if you can't open yet) through the coil from front to back
3. Slowly withdraw at least 10cm away before releasing the button. Releasing while inside leaves it worse than before
4. Repeat once or twice if rate stays high
5. Re-measure over 24h — expect return to your previous regulated rate

Prevention Beats Cure

• Magnetic clasps on iPad cases, handbags and fitness bands are the usual repeat offenders — store watches apart
• Some builds use anti-magnetic parts or soft-iron shielding; aftermarket mod parts generally don't, so treat exposure as real risk
• If a watch repeatedly re-magnetizes in your environment, find the source: sweep suspect items with the compass

Frequently Asked Questions

Is magnetization harmful long-term?
No permanent damage — it's fully reversible. But living fast stresses nothing except your patience and the date flip timing.

Can I use a magnet to "fix" it?
Absolutely not — that magnetizes it further. Only an alternating-field demagnetizer removes magnetism.

Demagnetized but still fast?
Then it's regulation drift — see our regulation guide.