Table:
text: GWR railcars
Fleet list
Fleet list
Number_Range Introduced Builder Engine Weight_long_tons Seats Withdrawn Notes
17 1936 Gloucester RCW 2 AEC of hp (kW) long tons (t; short tons) None 1959 Parcels car, capacity long tons (t; short tons)
19–33 1940–41 GWR, Swindon 2 AEC of hp (kW) long tons (t; short tons) 48 1960–62 33 rebuilt in 1954 to replace 37

Question: What are the grades if the number range is 17 on GWR railcars?