The 1450 class was a class of diesel locomotive built by Clyde Engineering, Granville for Queensland Railways in 1957-1958.

[2][3] To accommodate the Co-Co bogies, the unit was lengthened on both ends.

The Sarmiento Railway in Argentina operated similarly-lengthened G12s, officially designated the GR12.

The South American units differed from the Australian ones in having only the No.

Three have been preserved by Queensland Rail's Heritage Division, and are stored at Workshops Rail Museum, North Ipswich:[4]