First produced in the mid-1930s the popular Allen Scythe remained in production until the 1970s. A reciprocating knife mower, the Allen Scythe can be found either with a 2-stroke or 4-stroke engine. Early examples are distinguishable by the in-line (rather than transverse) petrol tank. A scaled-down version with a JAP 2A engine was known as the "Baby Allen Scythe".