Good day! I suggest that one of the Philippines ruling authorities, Republic, for subsections to be created of this ruling authority. Here as it follows:
Republic (1946-date)
Third Republic (1946-1972)
Martial Law Era (1972-1981)
Fourth Republic (1981-1986)
Fifth Republic (1986-date)
Source: https://en.wikipedia.org/wiki/Outline_of_the_Philippines#History_of_the_Philippines
for numismatic items and series, here as it follows:
third republic - english series
filipino series
martial law - portion of filipino series
Ang bagong lipunan (ABL) series
fourth republic - portion of abl
portion of flora and fauna series
portion of new design series
fifth republic - flora and fauna series
improved flora and fauna series
new design series
new generation currency (ngc) series
enhanced ngc series
polymer banknote series
Thank you very much for your cooperation. Let me know if something could be missing or excess.