A mower in which the conventional cutting cylinder is replaced by a cutter bar with blades moving in the horizontal plane as in the old agricultural harvesting mowers. The cutter bar was sometimes interchangeable with a cutting cylinder. Reciprocating-knife mowers were usually made for smallholdings and orchards rather than for lawns. See "Allen Scythe", "Autoscythe", etc.). Also known as Finger Bar, and Sickle Bar mowers.