Harrison M450 Lathe - late version badged "450" and with headstock control levers as flat bars with rounded ends and an apron where the centre section is stepped.

DoAll Lathe marked "16 ½” . This is actually a Harrison M450/500 Operation and Maintenance Manual with Parts as Exploded component Drawings.

Harrison M450 Lathe - early version, often badged "17-inch" in the USA and some other markets and with headstock control levers tipped with tapered black knobs. The end cover over the changewheels has a distinctive, large circle cast in at the top.