Fischer - Solid Polished Brass Marine Tide ClockFischer Brass Marine Tide Clock has been developed for nautical use. Because boats, ships and yachts are exposed to water, wind, sea salt and the elements it has been crafted out of the highest quality materials to give you not only a great look tide clock but one that is built to thrive on a boat and give you readings you can trust. Features Made in Germany High Quality Materials Takane Quartz USA Movement Suitable for marine use Watertight seal.