The six wheel trucks the car had in later years are all-steel. My understanding
is that these distinctive CP trucks did not appear until the Twentieth Century,
but I do not know exactly when. Does anyone know more about this???
Are you possibly are referring to the 6 wheel Burnett truck? They were
constructed out of plates bolted together. They were used on the first steel
passenger cars delivered in 1912 and eventually used on a number of different
cars.
Jeff
