Double chimney

retro-fitted to all the Kings of the Great Western. Another badge for tiny Tuesday. The classic G.W.R. design of C.B. Collett along with the Grange, Hall, Manor, and Castle classes of the 1920s to '30s all with 4-6-0 wheel arrangement.

       I distinctly remember one occasion at Paddington seeing the bell on the buffer beam of 6000 'King George V'. I always had to see the engine before boarding a train.

From Wikipedia: "

As the first of the class, No.6000 was specifically named after the then monarch of the United Kingdom King George V. Built at Swindon Works and completed in June 1927, following a period of running in, the locomotive was shipped to the United States in August 1927, to feature in the B&O's centenary celebrations. During the celebrations it was presented with a bell and a plaque, and these are carried to this day. This led to it being affectionately known as "The Bell". The bell carries the inscription:
                     Presented to
         Locomotive King George V
                          by the
  Baltimore and Ohio Railroad Company
           in commemoration of its
              centenary celebration
       24 September – 15 October 1927 "