The etching quality is amazing , it does look a_lot like the high quality etching on some Toledo Daggers and swords of the 1850's period, these were mostly signed " Fabrica de Toledo" . The breastplate itself is almost identical in shape of those of the French cuirassier guard of the French Napoleon III also mid 19th century. 
I agree with Yvian, in order the refine our knowledge we should also study 19th reproductions. 
kind regards 
Ulfberth
		 
		
		
		
			
		
		
		
		
		
		
		
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