1. Daily Wear — Good Habits

Always screw the crown down before any exposure to water on water-resistant models. The crown is the most common point of water ingress. On the Seiko 5 Sports and Invicta Pro Diver, the crown screws down against a rubber gasket — this seal only works when fully tightened.

Avoid magnetic fields. Strong magnets (speaker magnets, medical equipment, bag clasps) can magnetize an automatic movement, causing it to gain dramatically — sometimes 5-30 minutes per day. If your watch suddenly runs very fast, a watchmaker can demagnetize it in minutes for very little cost.

Avoid temperature extremes. Don't leave your watch on a hot car dashboard or expose it to extreme cold for extended periods. Lubricating oils in automatic movements change viscosity with temperature, affecting accuracy.

2. Cleaning Your Watch

For metal bracelets, clean every 1-2 months with a soft toothbrush, warm water and a drop of mild soap. Work the bristles into the links where grime accumulates. Rinse thoroughly and dry with a soft cloth. Avoid abrasive cloths that can scratch polished surfaces.

For leather straps, wipe with a dry or very slightly damp cloth. Avoid submerging leather — moisture degrades the material and promotes mold. Replace leather straps every 1-2 years depending on wear intensity.

For the case and crystal, use a microfiber cloth to buff away fingerprints and light scratches on polished surfaces. A watchmaker can polish deeper case scratches, though many collectors prefer to preserve natural patina.

3. Storage

When not wearing your watch, store it in a dedicated watch box or the original case — away from direct sunlight (which fades dials), humidity and dust. Automatic watches are best stored lying flat or with the crown up if placed upright, to minimize stress on the crown stem.

If you own multiple automatics and can't wear them daily, a watch winder keeps them perpetually wound and ready to wear. Set the winder to the correct turns-per-day (TPD) for your movement — Orient recommends approximately 650-800 TPD; Seiko NH-series movements use 650 TPD. An over-winding winder won't damage a modern automatic (the mainspring slips before breaking) but wastes energy.

4. Servicing Schedule

Automatic watches should be professionally serviced every 5-8 years depending on usage and the manufacturer's recommendation. Service involves disassembly, cleaning all components in ultrasonic solution, replacing worn gaskets and seals, lubricating the movement with specialized watchmaker oils and reassembling to factory tolerances.

Signs a service is overdue: the watch runs more than ±30 seconds per day outside its normal range, it stops unexpectedly despite sufficient power reserve, or you notice oil degradation (a watchmaker can see this under magnification). Never attempt to open the caseback and service the movement yourself unless you have professional training — amateur servicing more often damages than helps.

5. Water Resistance — What the Rating Really Means

Water resistance ratings are tested under static pressure, not dynamic conditions. Practically: 30m/3ATM (splash-proof only), 50m/5ATM (swimming in calm water), 100m/10ATM (snorkeling), 200m/20ATM (recreational SCUBA). Hot water and steam lower effective water resistance — remove your watch before hot showers even if it's rated to 100m, as the gaskets expand less effectively with heat.

Have water resistance seals re-tested every 2-3 years even if you don't get the watch wet — gaskets degrade with age and UV exposure regardless of water contact.

Summary: The Essential Watch Care Checklist

Always screw the crown down before water exposure
Clean the bracelet monthly with a soft brush
Store in a case away from sunlight and humidity
Avoid strong magnets and temperature extremes
Service every 5-8 years at a professional watchmaker
Re-test water resistance gaskets every 2-3 years
Replace leather straps every 1-2 years