the halberd, originally used for the foot soldiers against the horsemen, came back degenerated in the seventeenth century as an ornamental weapon that served as a sign for the under officer. sergeant and corperal 
the open-cut ax blade with ajour effects  was very common in the northern Netherlands  (1580-1660) and  can be seen on many "schutter" paintings. 
The halberd of post 1  is probably  from the middle of the 17th century, for comparison see the somewhat earlier examples in the emden museum. ( picture R carl koppeschaar) 
 
best, 
jasper
		 
		
		
		
			
		
		
		
		
		
		
		
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