Exe was one of the three original engines ordered with Manning Wardle supplied in November 1897 ready for the opening of the line in 1898. As originally supplied these engines had open bunkers at the rear and extended front cab sheets to each side over the tanks. Apparently these extended cab sides caused a smoke trap causing visibility issues. Modifications to each of the three Manning Wardles took place at Pilton during 1913. These modifications included enclosing the rear coal bunker thus increasing the cab size and removing the cab side window extensions that caused the visibility issues.
My model of Exe is in this guise dating the locomotive to 1913 - 1927.