Hi Graeme,
Hope you don't mind me splicing them together? But I wanted to show just how similar they are!
BTW: 'Nobre' is a surname, so I guess you are lucky enough to have an example where the maker is known!
Can I ask, what is the exact length of yours? Mine is almost exactly 10 inches.
If the Blade length is between 15cm and 18cm then you have a:
'Cuchillo de Faldriquera'