That's the unique number of this C.B.Collett-designed railway engine, built in 1924, and seen here on the North Norfolk preserved line at Sheringham.
Tony
For more info: http://photoreflect.blogspot.com/2008/04/not-so-common-sense.html
Tony
For more info: http://photoreflect.blogspot.com/2008/04/not-so-common-sense.html