An automatic watch like the Ironside 200 doesn't need a battery, but it isn't entirely maintenance-free either. A small amount of care goes a long way toward keeping a mechanical movement accurate and a dive watch's water resistance intact for years.

Wear It or Wind It

Automatic movements are powered by the natural motion of your wrist. Worn regularly, the Ironside 200's Seiko NH35 movement stays wound on its own. If it sits unworn for more than a day or two, give it 20-30 turns of the crown to get it running again, or a few shakes to kickstart the rotor before putting it on.

Respect the Water Resistance Rating, But Check the Crown First

A 200m rating means the Ironside 200 is built for swimming and diving, not just splashes. That said, water resistance depends on the crown and case seals staying intact. Always make sure the crown is pushed in fully before the watch goes near water, and avoid operating the crown while wet or submerged.

Rinse After Salt Water or Chlorine

Salt water and pool chemicals are harder on gaskets over time than fresh water. A quick rinse with fresh water after ocean swims or pool sessions, followed by a dry with a soft cloth, keeps the case and bracelet or strap in good condition.

Keep It Away From Magnets

Mechanical movements can run fast or lose accurate timekeeping if exposed to strong magnetic fields — phone speakers, laptop edges, and handbag clasps are common culprits. If a watch that's been running fine suddenly starts gaining significant time, magnetism is the first thing to rule out before assuming something's broken.

Service on a Sensible Schedule

Automatic movements like the NH35 are built to run for years without attention, but a service every 4-5 years — a clean, oil, and seal check — keeps water resistance reliable and the movement accurate. It's a cheap step compared to the cost of the watch itself.

The Bottom Line

An automatic dive watch rewards a small amount of basic care: wear it, rinse it after salt water, keep it away from magnets, and get it serviced occasionally. Do that and a well-built movement like the one in the Ironside 200 will keep accurate time for a very long time.

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