Borca has a canon insignia, page 28 of Gazeteer 4.
"The Borcan insignia depicts a black and silver serpent on a burgundy field, its coils severed into nine parts and flanked by nine silver stars. Officially, it symbolizes the nine original city-states of Borjia, though cynics muse that it now aptly represents the foundations of Borcan culture: Wine, wealth, and trechary."