There are genuine hilts cast from bronze/brass. I haven't seen any solid ones - only with fillers like clay or cutler's resin. 
 
The one shown in the first posting apparently was never in use (obstructed pesi hole; freshly cut base after casting); it also exhibits casting flaws at the front which (in addition to its heavy weight) make a real use as hilt unlikely IMHO. 
 
From the pic, the one from Leiden does not look like a high quality example either (again, IMHO). 
 
Regards, 
Kai
		 
		
		
		
		
		
		
		
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