613-457 Tide & TimePolished and lacquered solid brass tide and time clock. White dial features Arabic numerals and Atlantic Ocean tide track. Also beveled glass crystal. May also be wall mounted. 645-501 Single Base (sold separately). Quartz battery operated movement.Dimensions:D. 2-3/4" (7 cm) Dia. 5-1/4" (13 cm)Product : HOWARD MILLER TIDE & TIME SOLID BRASS ATLANTIC OCEAN ONL Manufacturer : HOWARD MILLER Manufacturer Part No : 613-457