What a great piece!  Been looking for one like this.  AND you have the scabbard as well!  Thanks for posting this - very helpful since these don't seem to be very common.  
Also I would etch the blade.
And thanks too to Dimasalang.  Yes we had been told these were Batangas, but you seem to have better information - Bikol, and called a minasbad.  
Wonderful!