Quote:
	
	
		
			
				Originally posted by Bob Moseley  
"to the best of my knowledge it is one of the rear seats from a Marmon-Herrington 6x6 breakdown truck." 
 
So if we can find a picture of the rear of one of these we can compare.
			
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 Pic from the Australian War Memorial Photograph Database shows your seat is similar, but not identical. Maybe best as well, would not know if I could survive a jar of Vegemite 
"Negative Number: 127761 AUSTRALIA. LORRIES 3-TON BREAKDOWN (AUSTRALIAN) NO.3. REAR VIEW. "

Source: 
http://www.awm.gov.au/database/collection.asp