Nice score on the binangon, Spunjer! I'll call it a tinegre since it has the figural anito head. Either way it's Ilonggo so I wouldn't call it a sanduko.
As for the floral motif found on swords on the island of Panay, the katmon flower figures highly as a cultural and mythical motif especially among the Suluds of the highlands. It's a very common motif embroidered among their blouses. As Spunjer noted, it is representative of the 4 cardinal points. However, the pre-Spanish belief was that the flower was an offering to Bakunawa to prevent his wrath upon the people which usually was floods, typhoons, etc. Moreover, Bakunawa was blamed for eclipses....as explained in this Amaya episode.
HTML Code:
http://www.youtube.com/watch?v=vD656KPnrv8
One example of the katmon flower being used as an offering is that it is placed in the first hole dug for the mainframe posts of a house. Depending on the time of the year the structure is made determines the direction in which Bakunawa is resting and holes are then dug in a certain direction and order accordingly. This offering and the correct procedure in constructing a house or building prevents Bakunawa's wrath and helps protect it from typhoons, floods, earthquakes, etc.
Regards,
Bangkaya