The Greek-Iberian writing system is basically a Jonic Greek alphabet, except for the creation of a new trill sign, a 'rho' with an upper accent for transcribing r. Besides this, it's worth noting the presence of a particular Jonic sibilant sign, nowadays called 'sampi', for Iberian s. Also worth noting is the fact that Greek-Iberian does shows occlusives not followed by a vowel and that there is no specific representation of the Levantine's signs m and m'(accented m).