The sand timer, more commonly referred to as the hourglass, is a device used to keep track of time. Minutes are measured as sand moves from bulb to bulb. During a voyage, the hour glass would be one of few reliable ways to measure time at sea alongside a compass to assist overall navigation. This brass, invertible hourglass stands on a metal base, navigating us through the days.Made out of brass with a two-tone antique finish Revolving sand timerFinish: Black Bronze Hand-Made: Yes Height: 8-1 2 Length: 4-1 2 Materials: Brass Weight: 0.8 Width: 4-1 2