And i've got news for you, Capitão ... although a bit surprising.
It seems as this type of sabre has also equiped the French Navy. 
I have spotted the example in the pictures attached, mentioned by the owner as a Navy example, being the same as the one figuring in the work L' OUVRAGE  "LES SABRES PORTES PAR L' ARMEE FRANCAISE" DE JEAN LHOSTE ET PATRICK RESEK , page 265 picture 475.
With a 77 cms. blade, this is a most most atypical sword, 
as its guard is in iron.
Go figure; a navy sabre with an iron guard.  
 
 
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