With the opening of the Southern and Western Railway in 1865, the Government of the State of Queensland decided to adopt the innovative 3 foot 6 inch gauge for the railways in the state. The first locomotives were ordered from the Avonside Engine Coy of Bristol in the United Kingdom, and are noted as “A” class.

We have modelled the second type, "B" class, ordered in the 0-4-2 format with radial axle boxes manufactured by Neilson & Coy of Glasgow. This class of locomotive entered service in August 1866 and remained in service until November 1902.

The 5 inch gauge locomotive dimensions are as follows:

Length of Locomotive 750mm
Length of Tender 395mm
Width 260mm
Height 397mm
Driving Wheel Diameter 115mm