Short answer: watches are normally described as water resistant, not permanently waterproof. A depth or pressure rating is a tested specification, but the safe activity still depends on the exact model, its crown and pusher design, strap, current gasket condition, and the manufacturer’s instructions.
Why a water-resistant watch can still leak
Water resistance depends on the complete case system, including the crystal, case back, crown, pushers, and gaskets. Gaskets age, impacts can deform parts, and opening the case for service can affect the seal. That is why a rating should not be treated as a permanent guarantee.
Pressure ratings also do not mean every activity is suitable at the printed depth. Brand guidance varies, so check the manual for the exact watch. Avoid generic claims that every 50M, 100M, or 200M watch has identical permitted uses.
How to read common water-resistance markings
- No water-resistance marking: keep the watch away from moisture.
- Water resistant / 3 bar: commonly intended for minor everyday splashes, not swimming.
- 5 bar: some manufacturers permit ordinary swimming, but confirm the model instructions and strap suitability.
- 10 or 20 bar: may support more water activity, but scuba suitability requires the correct diver designation and model guidance.
- Diver’s watch: use only within its documented diving category, instructions, and service condition.
How to protect water resistance
- Keep the crown fully pushed in or screwed down before water exposure.
- Do not operate the crown or pushers while the watch is wet unless the manual explicitly allows it.
- Rinse suitable watches after seawater exposure and dry them with a soft cloth.
- Avoid hot baths, saunas, and sudden temperature changes.
- Have gaskets and water resistance checked periodically and after the case is opened.
- If condensation persists or water enters the case, stop using the watch and arrange service.
Current Infantry watches to compare
All Amazon, competitor, and obsolete Shopify cards in the old article have been removed from this candidate. These Infantry products were verified in Shopify as active and in stock on September 16, 2026; inventory can change.
FIELD OPS — 100M Water Resistance
A 41mm quartz field watch with sapphire crystal and a screw-down crown. Check its instructions and strap condition before water use.
Vintage Dive Watch — 200M
A 40mm Seiko NH35 automatic watch with sapphire crystal and bezel, screw-down crown, luminous dial and hands, and 200M water resistance.
Aqua Bronze Dive Watch — 200M
A 42mm bronze-case automatic watch with Seiko NH35 movement, sapphire crystal, screw-down crown, luminous dial and hands, and 200M water resistance. Its leather strap may be unsuitable for repeated water exposure.
Frequently asked questions
Is 30M water resistance suitable for swimming?
Do not assume so. Manufacturer guidance commonly limits 3 bar to minor splashes. Check the exact watch manual.
Can I press chronograph pushers underwater?
Not unless the manufacturer explicitly states that the model permits it.
Is water resistance permanent?
No. Gaskets and components age, and impacts or case opening can affect the seal.
Bottom line: use the marking as the start of your check, then follow the exact model instructions and keep the watch properly maintained.