The Hudson Mk. II differed from the Mk 1 in having
constant-speed propellers and a strengthened airframe. RAF
serials were T9366/T9385 (c/n 414-2401/2420). One of the planes (T9367) was used
by BOAC but retained its RAF serial.
Lockheed's Made-Over Bomber, Freeman Westell, Wings, Vol 26, No. 6,
p. 46 (1996).
Lockheed Aircraft Since 1913, Rene J. Francillon, Naval Institute
British Military Aircraft Serials, 1912-1969, Bruce Robertson, Ian Allen,