xin1jun2 SG yo charles u noticed that too yes i am onto the mark2s. they will soon be found ( willing to bet on svc 151 got the ex 19s and 3s) ZYX
off_service SG Service 3 used non airconditioned MK2 Walter Alexander before. As for service 19, I think it is the same as service 3, MK2 WA.