first run of the 'Inlander' train set in Queensland, Australia, February 1953

What looks like a colorized photo of the first Air-Conditioned passenger car set in Queensland service on a trial run to Toowoomba carrying invited guests on Sunday 1 February 1953. Here it crosses Swansons Bridge in the Toowoomba Range.

The set is hauled by an 1150 class 1100 hp diesel-electric of Co-Co axle arrangement. QR's first mainline diesels, ten units were supplied by USA's General Electric over 1952-1953.  More info