Zirconium Nitride (ZrN) finish deposited by physical vapor deposition. Finish is corrosion, abrasion and chemical resistant. One "AA" battery required (High quality Alkaline battery recommended for best performance). The item "TRINTEC NAVIGATOR SHIPS QUARTZ CLOCK NAV-01 Zirconium Nitride (ZrN) finish" is in sale since Tuesday, March 14, 2017. This item is in the category "Antiques\Maritime\Maritime Clocks". The seller is "terrytrain" and is located in Niagara Falls, New York. This item can be shipped worldwide.