Quote:
	
	
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					Originally Posted by ariel
					
				 
				A remarkably well-educated and knowledgeable participant on another forum has identified it as... Corrida implement! 
 According to him, descriptions of such a device can be found at: 
  
 M. Defourneaux, "L`Espagne au siecle d`or", 1996. 
 Page 176 
  
 Théophile Gautier,Voyage en Espagne 1862. 
 Page 353 
  
  and in multiple other Spanish and French contemporay sources. 
 It was allegedly used by peons ( maintenance workers) at the corrida to immobilize and to slaughter the still-alive bull. 
  Spanish colleagues:  any access to first-hand information? 
  French speakers: can you verify the above sources? 
			
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 Hmmm... pretty unlikely, I'm afraid.
The "
medialuna" or "
media-luna" was (still is) indeed a tool to hamstring the bull, not only in the "corrida" but also in cattle-herding. I managed to find a picture of an old one:
It is also known as "
desjarretadera" ("harmstringer"). There's some modern variations that are no longer crescent-shaped. It was used at the end of a long staff (as it's mentioned in Gautier), in Spain and in areas of Spanish influence. 
I'm no specialist, so I might be wrong, but it would really surprise me if the "sword" in discussion was such an instrument... 
Best,
Marc