Are the Brown Green coaches airbraked? If not then only WDM1-3x excluding WDM2B, WDG2 and 3(few rare cases), WDP1, WCx locos (theoretically), WCAM1, WAM1-4(excluding 4E), WAP1-3, and WAG1-5(6 also?) can pull them. Out of these only locos that are in service that are VB are WDM2s (few). The only locos in service that are DB are WAM4(excluding E subclass), WAP1, WAG5, WDP1, WDM2A, WDM3x, WDG2, and WDG3 and 3x (few rare cases).