This is a 17-jewel mechanical movement spherical clock mounted on a solid brass stand with a magnetic compass in the base.  It stands 4 7/8 inches (12.4 cm) tall, 3 inches (7.6 cm) wide, and the body of the clock is 2 1/8 inches (5.4 cm) in diameter, and the clock can set to any angle for convenient viewing. 

The clock's face has additional numbers for both 24-hour military time and the 60 seconds.