Cute countermarks of the day..

[featherz]

Cilicia, Diokaisarea, Caracalla, 198-217 AD, AE 31.85 mm (21.15 gm.). Obv.: Laureate bust of Caracalla, AVTOK KAI M AV ANTΩNEINOC CEB. Rev.: Athena, riding quadriga, holding thunderbolt and snake-fringed shield, AΔP ΔIOKAICAPEΩN. SNG Levante 673 (same eagle-countermark, same dies but not the thunderbolt-countermark); Howgego 337 (for same two countermarks on one coin).

[whitetd49]

Hmm, snake-fringed shield!  Now that is compelling symbology.  I think one must climb deep into the minds of the ancients to figure that one out!

[vic9128]

Isn't that an Aegis?

Perseus gave  the gorgon head to Athena, and Hermes inserted the head in the middle of her shield.