How to portray a Spartan king from the classical era?

[Phalanx300]

I see, bit weird how Thespian Hoplites are always portrayed with black clothing?

Also I've read that some Spartans would have worn an inscripted horned horse symbol on their cheeck parts to honour the Hippeis, is this true? If so it would be a better symbol for me to wear on an future Corinthian Helmet then the inscripted ram in honour of Apollo.

Edit:

Also, are the any known clues on the shield emblems of the Thespians?

I'm mostly interested in the Spartans, Thespians, Tegeans and Argives for their battle spirit. I know the Spartan emblems and Argive emblems, judging from Spartan World the symbol from Archaic Tegea was the red boar which would make a likely emblem. How the Thespians looked seems to be a big mystery (probably is).