Flag of Partido Auténtico Herediano of Costa Rica
Own work, SVG version of raster files in Commons, 1:2:1 bands proportion, using the colors from Heredia province flag, not using letters (can be added later if sources provided/found). This file was derived from:

 Bandera Partido Auténtico Herediano.gif: 
PAH-flag.PNG:
Roqz