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					Originally Posted by Fernando K
					
				 Hello, Fernando
 I wonder what that piece is decorated, retained by a screw, located in front of the bowl (pan) and its flange (bridge)
 
 Affectionately. Fernando K
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 There is also one in front of the hammer base. They are finely filed. They are described as mirrors (espelhos=espejos). I ignore their pourpose ... decoration, protection, dust guards. 
I can see similar ones in a pistol made in Oporto dated 1780 and also in one made in (Ex-Portuguese Indian territory) Goa in 1776. I will try and find out what they are for.