Clearly based on the Drummond 3.5" M-type, this 3.5" x 15" backgeared and screwcutting lathe is tagged as being manufactured by Devon Machine Tools of Ipswich Qld. Australia. Three examples are known; one with flat-belt drive - as shown below - another with flat belts but a slightly different headstock and one with V-belt drive.
More details to follow as the lathe illustrated is rebuilt.