Hello Alan, 
 
The central spike seems to have a weird, asymmetrical shape. 
 
I believe I see another lateral spike curving out from the base - not easy to see since its back (cp. my red arrows) points towards the camera; the fourth spike would be hidden behind the central spike in my opinion. 
 
Regards, 
Kai
		 
		
		
		
			
		
		
		
		
		
		
		
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