Cape Cod® Tide Keeper: This handsome Atlantic Coast tide clock with a silver face in a highly polished solid brass case. A single AA battery powers the precision movement for two years or more. Manufactured with great care and pride, making this Cape Codder tide clock one of kind! 6" diameter dial in a deep, solid brass case. For Atlantic Coast only. 10 Year limited warranty. Normally ships in 1-3 business days.