Cast Iron bowl animal drinker, also known as a paddle drinker. A small amount of water below the paddle stimulates the animals to push the flap. Brand is LA BUVETTE - and is made in France. Can be used with a normal hose fitting (as in photo) or can be permanently plumbed to a water supply. Supply can be up to 8 litres per minute. Comes with two mounting screws for attaching to a post. Probably better suited to smaller animals, sheep, pigs, goats and calves.