The originals had been 0 - 4 - 0s with intermediate axles .
The reconstructions were unique among GWR 0 - 6 - 0 tender engines in having inside frames and being of the long boiler type .
The originals had been 0 - 4 - 0s with intermediate axles , and the reconstructions were unique among GWR 0 - 6 - 0 tender engines in having inside frames and being of the long boiler type .