Thank you all for your sugestions, Gentlemen.
This exercize of trying to find out what an unkown thing is, can be a fascinating theme, specially because of the variety of sugestions put up.
So far we have a lucet, a slingshot ( 

 ), a plumbers tool, a hand cross, and a war club ( 

 ).
Although the lucet seems to be the closest sugestion, i don't think it is one; but i am not based in any evidence to so think.
I could swear it is not from Yorkshire  

 ; i am more certain of that than of the eventualy that it might be a weapon  

 .
Fernando.