stainless steel time and tide clock - contemporary stainless steel. Synchronised to the moon's daily cycle, the combination time and tide clock gives you an innovative and convenient guide to tides, whilst also providing conventional time keeping. The black conventional clock hands work quite independently from the tide hand and can be adjusted using the small fly wheel on the back of the movement. The tide hand can be adjusted using the larger wheel, again found on the back of the movement. 195mm in diameter. Wall mounted.