Epeirote Pezhetairoi feature a charging bull on their shield, don't they, TA?

The anchor for Arche Seleukeia was prominently displayed on a number of Seleukid coins and was attributed to Seleukos I, but I can't remember why. I know that the anchor also showed up on some Parthian coins (eg in one of the loading screen) and I can't help but feel that it was used to legitimate Parhtian over Greek subjects.

Actually, what would probably make a very cool Seleukid rebel banners would be the horned horse of Seleukos and Apollo on the Omphalos.