It was a cursive,easier to write evolution of the Estrangela script. The letters are simpler and go with the flow.
The Serto script developed under Byzantine rule. This is also evident in its vowel diacritics which were adopted directly from Greek writing. The letters are Α,Ο,Ε,Η,ΟΥ or a,o,e,i,u respectively.
While the Eastern Madnkhaya developed under the Sassanids.
Table of Serto letters
| Serṭā | Transliteration | IPA |
|---|---|---|
 | ʾ | [ʔ] or silent |
 | hard: b soft: ḇ (also bh, v) | hard: [b] soft: [v] or [w] |
 | hard: g soft: ḡ (also gh, ġ) | hard: [ɡ] soft: [ɣ] |
 | hard: d soft: ḏ (also dh, ð) | hard: [d] soft: [ð] |
 | h | [h] |
 | consonant: w mater lectionis: ū or ō (also u or o) | consonant: [w] mater lectionis: [u] or [o] |
 | z | [z] |
 | ḥ | [ħ], [x], or [χ] |
 | ṭ | [tˤ] |
 | consonant: y mater lectionis: ī (also i) | consonant: [j] mater lectionis: [i] or [e] |
 | hard: k soft: ḵ (also kh, x) | hard: [k] soft: [x] |
 | l | [l] |
 | m | [m] |
 | n | [n] |
 | s | [s] |
 | ʿ | [ʕ] |
 | hard: p soft: ᵽ (also ph, f) | hard: [p] soft: [f] |
 | ṣ | [sˤ] |
 | q | [q] |
 | r | [r] |
 | š (also sh) | [ʃ] |
 | hard: t soft: ṯ (also th, θ) | hard: [t] soft: [θ] |