Hello MacCathain,
I think that your sword coming from the Bicol region, see here:
http://www.vikingsword.com/vb/showth...ighlight=bicol and the attached pictures from my own swords.
I am convinced that this is a typical blade form from the Bicol region, like you see in the provided thread that not all with me in agreement. Read the thread and built up your own opinion.
Sadly is your sword in poor condition and would benefit when you would give it a little bit care.
The last picture shows the rather thick spines of my swords, you write that it is by your sword similar.
Regards,
Detlef