To those hardy souls continuing to traverse land, sea and air over this strange summer, remember the golden rule; there’s a ‘Router for that
The dial on the RR1205-0 is unusual, with the 24 being replaced by the Zero. The Canadian National Railway approved that dial many years ago.
I think it has been broadly agreed that '0' dials were approved for use on the CNR whilst the '12' were for the CPR. I'm obviously more than happy for a native to correct me on this point!