Panerai Submersible

Seals and pressure testing

Salt water, chlorine and sunscreen wear down gaskets faster than ordinary wear does. If you swim or dive with a Submersible, have its water resistance checked at least once a year and before any dive trip, separate from the full movement service.

If moisture ever appears under the crystal, stop wearing the watch and take it in straight away.

Ask for the pressure test result after every service and keep it with the watch's papers. If you plan a dive trip, book a test a few weeks ahead so there's time to fix anything the test finds.

Temperature changes stress seals too. Going straight from a hot beach into cold water, or wearing the watch in a hot tub, is harder on gaskets than most owners realize.

Bezel and crown bridge

The diving bezel should turn one way with firm clicks and never slip backwards. Sand and salt can make it stiff or loose, and cleaning or replacing bezel parts is routine work.

The crown bridge and its lever should lock the crown firmly. A worn lever or crown seal is one of the most common reasons a Submersible fails its pressure test.

Rinse the bezel in fresh water after every salt water swim and turn it a few times while rinsing. It flushes out grit before it builds up, and it keeps the action crisp for longer.

If the bezel insert is scratched or faded, ask whether a replacement is available for your reference. On some materials, like ceramic, the insert resists scratches well but can chip on a hard knock.

Buying a pre-owned Submersible

Ask when it was last pressure-tested, not just serviced. Turn the bezel, work the crown bridge and check the case for knocks around the crown guard.

Confirm the reference and movement with a specialist and buy from a seller who will stand behind the watch.

Check the case material and its condition. Bronze cases develop patina, titanium shows scratches easily and ceramic can chip, so knowing the material tells you what to look for.

If the watch has been used for real diving, ask for its pressure test history. A seller who has tested it regularly has probably looked after it well in other ways too.

Steel, titanium, ceramic and bronze

Submersibles come in a range of case materials, including steel, titanium, ceramic and bronze. Each wears differently. Titanium is light and scratches more easily, ceramic resists scratches but can chip if knocked hard, and bronze develops a patina that many owners like and some don't.

Bronze patina is part of the look, so don't let a shop polish it off unless that's what you want. Ask the watchmaker how they handle each material before any refinishing.

Bronze can also leave a green tint on the skin under the caseback if it gets damp, which is why bronze Panerais typically use a titanium caseback. It's worth knowing before you buy one for daily wear in hot weather.

Living with a large dive watch

A Submersible is a big watch, and it's built to be used. That means a routine: rinse it after salt water, keep the crown bridge closed in the water, and have the seals tested regularly. Do those three things and the watch will take a lot of use.

If you only wear it on land, the servicing interval can follow the brand's normal guidance, though an annual pressure test is still cheap peace of mind.

Larger dive cases also need a strap that holds firmly. Rubber straps suit the Submersible well in water and are easy to swap, while leather straps should stay dry.

What to check on a Panerai Submersible

• Pressure tests between services if the watch goes in the water
• Bezel cleaning and repair when the action stiffens or slips
• Crown bridge and seal inspection as standard

Common questions