[Ausloco] Queensland Wheel Tread Profiles

["Melanie J. Dennis" <meld.asg@netspeed.com.au>]

Can anyone give a date (or date range) when Queensland changed from flat (cylindrical) to tapered (conical) wheel treads on their locos and rolling stock please?
Melanie Dennis
Australian Steam Group
meld.asg@netspeed.com.au



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