37263 revised second edition

The updated second edition of the known workings of D6963 later 37263 from its introduction in January 1965 to the 30 December 2024, (and also some suspected items that will take place in 2025. This is a fully revised and expanded version of the book that was published in 2020 with a great deal of new information added making it the most complete record of this locomotive ever put in print.