1933 The passenger turbine steamer Queen Mary was built by William Denny and Brothers for the Williamson-Buchanan Steamers company as a pleasure steamer for use on the Clyde, and was put in service in May 1933.
250ft. long, 35ft. broad, with a depth of l0ft. 7in. to the main deck. Triple-screw machinery, with the propellers running at 300 rpm, the H.P. turbine being arranged on the centre shaft and an L.P. turbine on each wing shaft. The astern turbines were fitted on the L.P. turbine rotors. Saturated steam provided by a 100 psi double-ended coal-fired Scotch boiler fitted with Neil's rocking grates and working on the closed stokehold system with forced draught.[1]
1935 The Queen Mary was renamed Queen Mary II as the new Cunard Liner being built on the Clyde would be named Queen Mary[2]
The ship's high pressure turbine is preserved in the Scottish Maritime Museum, Irvine.