Rusted, yes. Gunong, yes. Antique, I don't think so. With its pointed luks and the way the hilt terminates in a flat manor (I think that an end piece is missing) it looks to me to be post WWII. As I am not in any way an expert on these I am sure that someone a lot more knowledgeable on identifying dateing these will comment on this shortly.  
 
Best, 
Robert
		 
		
		
		
		
		
		
		
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