From 1986 Class 37s were fitted with high intensity head lights and this version was numbered D6700-D6718,37001-37119

Subsequently many appeared on other sub class’s37/5s and 37//7s. This design had nose end doors on the front end with light clusters and sandbox fillers, including a off set high intensity headlight fitted this model fits 2000-2010 period Bachmann split chassis

NOTE this may or may not fit the Poole production solid chassis type ,with the  later bodied plug in nose cone type haven’t tried it yet