Operating largely in Australia's remote mining areas, this strip of five se-tenant stamps feature the world's biggest, longest and heaviest machinery.
Designed by Jamie Tufrey, responsible for two other stamp series 'Down on the Farm (2005)' and 'Blast Off! 50 Years in Space (2007),' the heavy haulers featured include:
The MS Berge Stahl
Issue date: 1 April 2008