After getting #59 with the propane engine, ETS received 10 more buses from Twin in 1950. Instead of a 180 HP FTC 180 propane engine, they had the more powerful FTC 210 210 HP propane engine. These buses were model 45-SP and numbered 60-69. All were retired between 1971 and 1975.

Thumbnail	Bus #	Date	Description
	62	May 10, 1966	ETS #62 leaving Westwood Garage.