Most of this class had the later Collett reinforced drivers with the pin between, apart from the prototype and at least No 4901.
Photos in Locos Illus No 140 Swindon's New Century part 3 show that at least two Locos of the first production lot, Locos 4921 and 4954 had the later Collett reinforced drivers.
Haresnape shows Nos 5943 and 5955 also with the later Collett reinforced drivers. A full set consists of 4 x T19 leading, 6 x T46 driving and 6 x T20 tender wheels.

Suitable for Gauge One Fine or Standard.

The prototype driving wheel weights are surface mounted plates, and are not cast in.

Links:   Home.   Casting prices and stock: T19, T20, T46.   Wheel data: T19, T20, T46.   GWR loco sets price list.

Full size for 103 dpi screens.   Bare weight c. 1330 gr.