32-390DB Class 37/7 37704 EW&S (regional exclusive model) - 21 pin DCC

History of the Class 37

When the initial 1955 dieselisation plan was announced, no locomotives were envisaged in the 1700 hp rang.  Consequently the class 37's were introduced in 1960 as an intermediate loco between 1250 hp Type 2's and the 2000 hp Type 4's. Apart from a variation of bogies (changing from castings to fabricated sections), removal of steam heating boilers from some locos, conversion of water tank to extra fuel tanks on some W.R. units, and the fitting of dual vacuum/air brakes, few alterations have occurred outwardly to the locos since introduction. 

When initially introduced, the E.R. put them on Norwich to Liverpool Street and other Great Eastern line services, and ran them alongside their stablemate Class 40's. The  next batch went to Hull and Tinsley (Sheffield) for working passenger and freight duties, including the Hull to Doncaster portion of the 'Yorkshire Pullman'.