Those are collectible for sure. I have your currency, for way back when I visited. The bills are not special in themselves; they are just consecutive serial numbers. But I treasure them! I have good memories of the Phillipines. The people I encountered throughout my trip were sincere and very friendly!
!BBH
!PIZZA
Here's a photo from my files!
My journey with collecting bills started also with consecutive serial numbers from my first salary and the rest was history..Thanks for dropping by @silversaver888