Origin of this knife?

[fernando]

Forgive me, for i am an ignaro. Do i see any relation between these three and the knife questioned by Eftihis , plus all that was shown and said in the periphery?
The top one is surely brazilian, as it holds the sellers name and adress.
The center one, with a scabbard like the one in Oriental Arms, has a blade engraving " ENFIN " ( french for "at last" ), which diverts my guessing on its origin.
The bottom one, with a hilt mount again similar to the one pictured and described in Oriental Arms, is also a mistery for me.
I hope to learn further data on them, at following this thread.
Thanks
fernando