Thank you gentlemen for your replies. Jose, I'm sure you are correct after further searches on your suggestion of the Malolos government. The triangular symbol with the sun and 3 stars in the corner was part of the flag designed by Aguinaldo in 1898. There's some debate about the exact dimensions and precise colors. Interesting article here
http://www.crwflags.com/fotw/flags/ph-hist.html
I was thinking Ilocos Norte, but know so little that I didn't want to presume. I'm reading some Philippine history, but unfortunately don't retain as much as I did when younger.
Again, thank you all. Can't wait to get this one in hand!
Steve
(flag image and article by Manuel L. Quezon III)