I don' t know why, because you never see it in the movie, but the scarrard for the sword has "THESEUS" written on the underside of the strap. Theseus wields a Heraklion sword at times, but never a scabbard. Sword and shield have no markings on them. Of note, it is very clear that whoever produced the shields for 300 also produced the shields for Immortals as the builds are identical.
