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. Instruction Manual, Maintenance Manual and Parts Manual as useful Exploded Assembly Diagrams with 10 electrical schematics covering the various versions. This edition shows both headstock clutch/brake types.   (details of this lathe on my site here: https://www.lathes.co.uk/harrison-m/page5.html
For the late version of this lathe, which had black facia panels on headstock and screwcutting gearbox, see MHL450L