Spanish cup-hilts and bilbos for naval use?

[fernando]

Hi Captain,
I confess i find it hard to spot literature on this theme of cuphilt swords having been aboard. The couple books i access are chronicles of an earlier period, that in which the Portuguese were more involved in sea battles, then with swords of earlier style. Other written works will most probably exist, although presently out of my reach, narrating the period in which they had mostly resumed their presence in Asia to fortifications in firm land, time when forcingly cuphilts were at hand.
Bilbos are further out of my reach, as that would fall into Spanish exclusive typology and not of Iberian spread like the cuphilt.
However i can't let this go without any (say) substance and, if you permit me, i will post a portrait of Portuguese King Dom Afonso VI, in an actual period work, where we can confirm the national role of cuphilt swords, with enough protagonism to be used by Monarchs in their ceremony attire.

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