This quality 5.1/2" diameter 12-24 hour porthole clock is made of solid brass with a spun brass dial and quality quartz movement. It features a bezel height of 2" and weighs approximately 3 lbs. It also features predrilled mounting holes with brass screw. Access to the movement and battery compartment is provided through front opening porthole face. This clock is an excellent choice for a gift for nautical seeker and military personnel. Operates off one 'AA' battery. Easy to set and maintain. We carry rosewood clock plaques and brass engraving name plates to personalize it.