Thanx for all your input guys. 
This is definitely a beige / ivory colour. The bronze colour was used on some of the US engines I think. 
 
It looks like my best bet will be to try and clean up some part of the transmission and take it into a paint shop to get the colour read by a spectrophotometer. 
 
Unfortunately that won't tell me what the name of the original colour was, and I don't know if there is an easy way to reference the numbers from a spectrophotometer back to original paint names like "light stone" 
 
 
Kirk
		 
		
		
		
		
		
		
		
		
	
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