I guess these are the letters? https://en.wikipedia.org/wiki/Archaic_Greek_alphabets https://en.wikipedia.org/wiki/Archaic_Greek_alphabets Ϝ Digamma Ͱ Heta

I guess these are the letters? https://en.wikipedia.org/wiki/Archaic_Greek_alphabets https://en.wikipedia.org/wiki/Archaic_Greek_alphabets Ϝ Digamma Ͱ Heta Ϻ San Ϙ Koppa Ͷ Tsan, Digamma Ͳ Sampi